Introduction

Deleting all commit history from a GitHub repository means rewriting the repository so the current files remain but the old commit graph is replaced. This is a destructive operation that affects collaborators, open pull requests, forks, and any automation pinned to previous commit hashes.

When People Actually Mean This

There are two common reasons people ask for this:

• they want a clean "start over" history
• they accidentally committed sensitive data and want the old history gone

Those are not identical problems. For a clean reset, an orphan branch is often enough. For sensitive-data removal, you should usually use a history-rewriting tool such as git filter-repo and rotate the leaked secret as well.

Start-Over History with an Orphan Branch

If your goal is to keep the current files but drop the old history, an orphan branch is the simplest approach.

1git clone [email protected]:you/repo.git
2cd repo
3
4git checkout --orphan fresh-start
5git add -A
6git commit -m "Initial commit"
7git branch -D main
8git branch -m main
9git push --force origin main

What this does:

• creates a branch with no parent history
• commits the current working tree as a brand-new root commit
• renames that branch to main
• force-pushes it to GitHub

After that push, the branch history is effectively reset.

Why This Is Dangerous

A history reset is disruptive because every existing clone now points to commits that no longer belong to the branch. Collaborators usually need to reclone or hard-reset their local branches carefully.

It also affects:

• open pull requests based on the old history
• tags pointing to old commits
• issue references tied to specific commit hashes
• deployment systems pinned to prior commits

That is why this should be coordinated, not done casually.

Sensitive Data Requires More Than a Reset

If a password, token, or secret was committed, simply resetting visible branch history is not enough as an operational response.

You should also:

• rotate the credential immediately
• rewrite history selectively if the secret exists in multiple places
• consider forks and clones that may still contain the data
• review caches and artifacts built from the old repository state

For that kind of cleanup, tools such as git filter-repo or BFG are usually more appropriate than a blunt orphan-branch reset.

GitHub-Specific Note

GitHub will show the new branch history after the force push, but references to old commits may persist in forks, old clones, cached objects, or other external systems. So "delete all history" should be understood as rewriting the branch history, not as magically erasing every possible copy everywhere.

That is especially important for security incidents. History rewriting helps, but secret rotation is still mandatory.

Safer Alternatives

Before deleting history, ask whether one of these is enough:

• squash old commits into a smaller cleaned-up history
• create a new repository and archive the old one
• remove only the bad files from history instead of nuking everything

Often the real need is narrower than "delete all commit history."

Common Pitfalls

The biggest mistake is force-pushing rewritten history to a shared repository without warning collaborators first. That usually creates local confusion and accidental reintroduction of old commits.

Another issue is thinking that branch history rewrite automatically solves secret exposure. If a credential leaked, rotate it even if you rewrite the repository perfectly.

People also often forget tags and release references. Resetting main does not automatically fix every ref in the repository.

Finally, do not use this approach casually when the repository has compliance, audit, or legal retention requirements.

Summary

• Deleting all GitHub commit history usually means rewriting the branch with a new root commit.
• An orphan branch plus a force push is the simplest "start over" workflow.
• This operation disrupts collaborators, pull requests, and commit-based references.
• For sensitive-data incidents, rotate secrets and consider selective history-rewrite tools.
• Rewrite history only when you clearly understand the impact on the repository and its users.