What Does Git Push Do? Find Out Here

Every commit you make stays trapped on your local machine until you push it. So what does git push do, exactly? It transfers your committed changes from your local repository to a remote repository, making your work visible to everyone on the team.

Sounds simple. But the command carries more weight than most developers realize, especially when force pushes, rejected pushes, and branch tracking enter the picture.

This guide breaks down how git push works step by step, covers the most common flags and options, explains what happens when a push gets rejected, and walks through real fixes for errors you’ll actually hit. Whether you’re pushing your first commit or debugging a failed push on a shared branch, this is everything you need to know about the version control command that connects local work to the rest of the world.

What Is Git Push

Git push is a command that transfers commits from your local repository to a remote repository. That’s it. It takes whatever you’ve committed locally and sends it to the remote so others can access it.

Think of your local repo as your personal workspace. You make changes, stage them with git add, lock them in with git commit, and then push sends those locked-in snapshots to the shared remote.

The command sits at the end of the local-to-remote sync cycle. Without it, your commits exist only on your machine. Nobody else sees them.

According to a Hutte research compilation, 85% of developers say Git has improved collaboration within their teams. Git push is the specific mechanism that makes that collaboration possible, because it’s the moment your work leaves your laptop and becomes available to everyone else.

When you run git push with no arguments, Git uses your branch’s configured upstream to figure out where to send things. If there’s no upstream set, it tells you. No guessing, no silent failures.

The default behavior only allows fast-forward pushes. If the remote branch has moved ahead since your last pull, Git rejects the push. This is a safety mechanism, not a bug. It prevents you from accidentally overwriting someone else’s work.

By the GitHub Octoverse 2025 report, developers pushed close to 1 billion commits in a single year, a 25% increase year-over-year. Every one of those commits reached the remote through git push (or a pull request merge that triggered one internally).

How Git Push Works Step by Step

Running git push origin main kicks off a specific sequence under the hood. It’s not just “upload files.” Git is smarter than that.

Local and Remote Ref Comparison

Git first checks where your local branch pointer sits versus the remote-tracking branch. If your local main is three commits ahead of origin/main, Git knows exactly which commits need to go over.

It compares SHA-1 hashes, not file contents. The commit hash (that long alphanumeric string you see in git log) is the unique fingerprint for each snapshot.

Object Transfer

Commits, trees, and blobs are the three object types Git packs up and sends. Commits point to trees, trees point to blobs (file contents). Git only transfers objects the remote doesn’t already have.

This is why pushing a small change is fast even in a massive codebase. Git doesn’t re-upload the entire project. It sends the delta.

Remote Ref Update

After the objects arrive safely, the remote updates its branch pointer. The origin/main ref now points to the same commit as your local main.

Your terminal output shows something like abc1234..def5678 main -> main. That line tells you the old commit hash, the new one, and which branch got updated. If you see Everything up-to-date, there’s nothing new to push.

Fast-Forward vs. Rejected Push

A fast-forward push means the remote branch pointer simply moves forward along the same commit history. No conflicts, no branching off.

A non-fast-forward push gets rejected. This happens when someone else pushed to the same branch after your last fetch. Hutte data shows nearly 90% of developers experience merge conflicts at some point, and a rejected push is often the first sign that one is coming.

Git Push Syntax and Common Options

The basic structure: git push <remote> <branch>.

Most of the time, you’ll type git push origin main. That’s the remote name followed by the branch name. After you’ve set an upstream with -u, you can just type git push and Git fills in the rest.

Git Push Force vs. Force With Lease

This is where people get burned. --force rewrites remote history unconditionally. If your teammate pushed a commit five minutes ago that you haven’t pulled, --force destroys it. Gone.

Hutte’s data found that 45% of developers have been negatively affected by a colleague’s force push. That’s nearly half. It’s a real problem.

--force-with-lease checks the remote’s current state before overwriting. If someone pushed new commits since your last fetch, it refuses to proceed. Use this one. Always.

Well, almost always. The only time plain --force makes sense is when you’re the only person working on a branch and you know exactly what you’re doing. Even then, --force-with-lease costs you nothing extra.

Took me forever to figure out why --force-with-lease sometimes still overwrites things. Turns out, if you run git fetch right before force-pushing, the lease check passes because your local tracking ref is now up to date. The safety net only works if your fetch state is stale relative to someone else’s push.

Git Push vs. Git Pull and Git Fetch

Three commands, three directions. People mix these up constantly, especially when they’re starting out.

Git push: sends commits from local to remote. Data flows out.

Git fetch: downloads commits from remote to local tracking refs. Data flows in, but nothing merges into your working branch.

Git pull: runs fetch and then merge (or rebase, depending on your config). Data flows in and gets applied to your current branch.

Here’s the pattern that trips people up. You make commits locally. You try to push. Git rejects it because the remote is ahead. So you pull first, which merges the remote changes into yours, and then you push again. It’s a round trip.

A Hutte study found that 70% of developers have used a Git command without fully understanding what it does. Pull is probably the biggest offender here because it does two things at once. If you’re not sure what’s happening, run git fetch and git merge separately. Same result, more visibility.

What Happens When Git Push Is Rejected

You run git push. The terminal spits back: ! [rejected] main -> main (non-fast-forward).

Don’t panic. This is actually Git protecting you.

Why the Push Failed

The remote branch has commits your local branch doesn’t know about. Someone else pushed while you were working. Your commit histories have diverged, and Git won’t let you overwrite the remote’s newer commits with a normal push.

This is the “failed to push some refs” error that almost every developer hits at least once a week on active projects. It’s the single most common push failure.

How to Fix It

Option 1: Pull and merge. Run git pull origin main. Git fetches the remote changes and creates a merge commit combining both histories. Then push again. This is the safest approach.

Option 2: Pull with rebase. Run git pull --rebase origin main. This replays your local commits on top of the remote’s latest state. Cleaner history, no merge commit. But if you hit conflicts during rebase, you’ll resolve them one commit at a time.

Option 3: Force push. Only if you know what you’re doing and the branch is yours alone. See the section above on --force-with-lease.

Protected Branch Rejections

Sometimes the rejection isn’t about diverged history. GitHub, GitLab, and Bitbucket all support protected branch rules that block direct pushes entirely.

Hutte data shows over 85% of projects protect their main or primary branch from direct pushes. In those setups, the only way to get code into main is through a pull request with required reviews.

If you’re pushing to a protected branch and getting rejected, it’s by design. Open a pull request instead.

Pushing to Different Remote Repositories

“Origin” isn’t magic. It’s just a name.

When you clone a repo, Git automatically names the source remote “origin.” But you can add as many remotes as you want. Run git remote -v and you’ll see every remote your local repo knows about, along with their URLs.

Working with Multiple Remotes

This comes up a lot in fork-based workflows. You fork a project, clone your fork (that’s origin), and add the original project as a second remote, usually called “upstream.”

Push to your fork: git push origin feature-branch.

Over 90% of Fortune 100 companies use GitHub for software development, according to Kinsta. Many of those organizations run multi-remote configurations for mirrors, staging servers, or backup hosting across platforms like GitHub and GitLab.

Pushing the Same Branch to Multiple Remotes

There’s no single command to push to all remotes at once. You run git push origin main and then git push backup main separately.

Some teams set up a Git remote alias that points to multiple URLs using git remote set-url --add. That way, one push command hits both. It’s a neat trick for maintaining mirrors, though you should be careful about keeping them in sync if one remote goes down.

Honestly, most people only ever push to origin. But if your workflow involves forking, mirroring, or deploying from a separate remote, knowing how to manage multiple push targets saves you real time.

Git Push and Branch Tracking

An upstream branch is the remote branch your local branch is linked to. When that link exists, you can type git push with no arguments and Git knows exactly where to send your commits.

Without it, Git makes you spell out the full command every time: git push origin feature-branch. It’s not broken. It’s just annoying.

How Tracking Gets Set

First push with -u: Running git push -u origin feature-branch pushes your branch and sets the tracking relationship in one step. After that, plain git push works.

Cloned repos: When you clone a repository, Git automatically sets up tracking for the default branch. Your local main already tracks origin/main out of the box.

Manual setup: git branch --set-upstream-to=origin/feature-branch links an existing local branch to a remote one without pushing anything.

You can check all tracking relationships at once with git branch -vv. It shows every local branch, its upstream, and whether you’re ahead or behind.

The push.default Configuration

This Git config setting controls what happens when you run git push without specifying a branch.

Since Git 2.37, there’s also push.autoSetupRemote. Set it to true and Git automatically creates the upstream tracking relationship on your first push of any new branch. No more -u flag needed.

Honestly, push.autoSetupRemote = true is one of those config options that saves you five seconds fifty times a day. Took me way too long to find it.

Git Push in Team Workflows

Git push doesn’t exist in a vacuum. How it behaves depends entirely on the branching model your team follows and what happens after the push lands on the remote.

Hutte research shows 60% of teams use a feature-branch workflow, while 25% adopt Git Flow or a similar structured approach. The push step looks different in each one.

Feature Branch Workflows

The most common pattern in modern software teams. You create a new branch, do your work, push it to the remote, and open a pull request.

• Push goes to your feature branch, never directly to main
• Pull request triggers code review and automated checks
• Branch gets merged (or squash-merged) after approval

The Spotify engineering team popularized a variant of this pattern with their “squad” model, where each team pushes to isolated feature branches and uses pull requests as the handoff point for cross-team collaboration.

Fork and Pull Request Models

Open source projects run differently. You don’t push to the original repo. You push to your own fork and submit a pull request back to the upstream project.

Your push command targets your personal fork: git push origin feature-branch. The pull request is what gets your code into the main project. You never get direct push access to the original repository unless you’re a maintainer.

GitHub’s Octoverse 2025 report tracked over 36 million new developers joining the platform in a single year, with monthly pull request merges averaging 43.2 million. Most of that activity runs through fork-based workflows in open source.

Pushing After a Rebase

Rebase rewrites commit hashes. Every single one. Git sees them as entirely new commits, even though the code changes are identical.

That means a normal push fails after rebasing because your local history no longer matches the remote’s. The fix is git push --force-with-lease.

Hutte data shows roughly 55% of developers find rebase to be tricky and error-prone at times. And the push that follows the rebase is usually where things go wrong, not the rebase itself.

CI/CD Triggers on Push

Push events are the most common trigger for continuous integration pipelines. Every time you run git push, the remote can fire off automated builds, tests, and deployments.

GitHub Actions now processes over 5 million workflows daily, according to CoinLaw. ElectroIQ data shows continuous deployment through Actions increased by 50%, with deployment times cut by an average of 30%.

Hutte found that 78% of projects using Git integrate with a CI/CD tool to automate build and deployment. Your push isn’t just sending code to a remote. It’s starting a pipeline.

Common Git Push Errors and Fixes

Pushing should be simple. But it breaks in predictable ways, and knowing the fixes ahead of time saves real frustration.

Hutte research shows 70% of developers have used a Git command without fully understanding what it does. Push errors are where that knowledge gap actually costs you time.

Failed to Push Some Refs

The single most common push error. Your local branch is behind the remote.

Fix: Run git pull --rebase origin main, resolve any conflicts, then push again. If you prefer a merge commit instead of rebasing, drop the --rebase flag.

This error pops up constantly on active projects where multiple people push to the same branch. It’s not really an error. It’s Git doing its job.

Authentication Failures

GitHub dropped password-based authentication for Git operations over HTTPS back in August 2021. If you’re still getting prompted for a password and it keeps failing, that’s why.

• HTTPS users: generate a personal access token and use it as your password
• SSH users: check that your key is added to your GitHub account and loaded in ssh-agent

Hutte data shows 50% of developers have hit SSH key or authentication issues at some point. GitGuardian’s 2024 report found over 10 million secrets were exposed in public repositories in a single year, many of them accidentally committed tokens and keys.

Repository Not Found

This error means Git can’t locate the remote URL. Three common causes:

• The remote URL was typed incorrectly (check with git remote -v)
• Your access was revoked or the repo was deleted
• You’re using HTTPS but need SSH, or the other way around

Fix the URL with git remote set-url origin <correct-url>. Run git remote -v again to confirm.

Large File Rejections

GitHub blocks pushes containing files over 100 MB. GitLab and Bitbucket have similar limits.

If you accidentally committed a large file, removing it from the latest commit isn’t enough. It’s still in the commit history. You need to use git filter-branch or a tool like BFG Repo-Cleaner to scrub it from all commits.

For projects that regularly handle large binary assets (videos, datasets, design files), source control tools like Git LFS replace the actual file with a pointer, keeping your repo size manageable.

Timeout Errors

These show up on slow connections or when pushing to repos with enormous histories. A few things help:

• Increase the HTTP buffer size: git config --global http.postBuffer 524288000
• Use SSH instead of HTTPS (more stable on flaky connections)
• Push fewer commits at a time if the repo is very large

Command Linux data shows Git adoption reached 93.87% in 2025, with the version control market projected to grow to $3.22 billion by 2030. As repositories get larger and teams get more distributed, these timeout issues will only become more common.

FAQ on What Does Git Push Do

What does git push actually do?

Git push transfers committed changes from your local branch to a remote repository. It uploads new commits, trees, and blob objects that the remote doesn’t have yet. Without pushing, your work exists only on your machine and stays invisible to collaborators.

What is the difference between git commit and git push?

Git commit saves changes to your local repository only. Git push then sends those saved commits to the remote. Think of commit as saving a draft and push as publishing it for the rest of your team to see.

What happens when git push is rejected?

A rejected push usually means the remote branch has newer commits your local branch doesn’t have. Run git pull to fetch and merge those changes first. Then push again. Git rejects the push to prevent you from overwriting someone else’s work.

What does git push origin main mean?

This command pushes your local main branch to the remote named “origin.” Origin is the default name Git gives to the remote you cloned from. You can replace “main” with any branch name to push a different branch.

Is git push the same as git pull?

No. They go in opposite directions. Git push sends local commits to the remote. Git pull downloads remote commits and merges them into your local branch. Push is outbound. Pull is inbound.

What does git push -u origin do?

The -u flag sets the upstream tracking relationship between your local branch and the remote branch. After running it once, you can just type git push without specifying the remote or branch name on future pushes.

Can git push overwrite other people’s changes?

A normal push cannot. Git blocks it if the remote has commits you haven’t pulled. But git push --force can overwrite remote history, including other people’s work. Use --force-with-lease instead for a safer alternative.

What does git push –force do?

Force push overwrites the remote branch with your local branch, regardless of what’s on the remote. It replaces the remote’s commit history entirely. This can destroy teammates’ commits if used carelessly on shared branches.

Do I need to commit before pushing?

Yes. Git push only transfers committed snapshots. If your changes are still in the staging area or working directory, push has nothing to send. You must run git add and then git commit before pushing.

How do I push a new branch to a remote repository?

Run git push -u origin your-branch-name. This creates the branch on the remote and sets up tracking. After that first push, git push alone works for all future commits on that branch.

Conclusion

Understanding what does git push do goes beyond knowing that it sends commits to a remote. It’s the command that connects your local work to the rest of your team’s development process.

Once you grasp how push interacts with branch tracking, force push options, and build pipelines that trigger on push events, you stop treating it like a mystery and start using it with confidence.

Get comfortable with –force-with-lease over plain –force. Set push.autoSetupRemote to true` in your Git configuration. Learn what the rejection messages actually mean instead of panicking when they show up.

Git push is simple at its core. The complexity comes from the workflows around it. Know the command well, and collaborative development on GitHub gets a lot smoother.

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Bogdan Sandu

Bogdan Sandu specializes in web design, focusing on creating user-friendly websites, and innovative UI kits.

Many of his resources are available on various design marketplaces and for free on Codepen.

Over the years, he's worked with a range of clients and contributed to design publications like Design Your Way, Designmodo, WebDesignerDepot, WPDean, and Speckyboy, and Slider Revolution among others.

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