Introduction

The error remote unpack failed: unable to create temporary object directory is usually a remote-server problem, not a local-branch problem. Git is trying to upload objects, the server is trying to unpack them into a temporary directory, and that unpack step fails before the push can finish.

That is why "create a new branch" is not the real fix. A new branch may appear to avoid the symptom in some situations, but the underlying issue is almost always remote disk space, permissions, filesystem health, or server-side repository configuration.

What the Error Actually Means

During git push, the client sends a pack of Git objects to the remote. The remote then needs a writable temporary location to unpack and validate those objects before updating references.

If the remote cannot create that temporary object directory, the push fails with an unpack error. Typical causes include:

• no free disk space,
• wrong filesystem permissions,
• quota limits,
• a broken or read-only repository directory,
• server-side Git service misconfiguration.

None of these are fixed by changing your local branch name alone.

Why a New Branch Sometimes Seems to Help

Developers sometimes report that pushing to a new branch works while pushing to an existing branch fails. That can happen if there are separate server-side rules, hooks, or protection policies around the original branch. But if the exact error is about creating a temporary object directory, the unpack stage itself is still the main clue.

A new branch can also change the shape of what is being pushed, which may alter timing or object reuse enough to hide the server issue temporarily. That is a workaround at best, not a real repair.

What to Check First

Start by confirming the failure is not local corruption:

git fsck
git status
git remote -v

If the local repository is healthy, the next step is to inspect the remote environment. On a self-hosted server, check:

• available disk space,
• permissions on the bare repository and its parent directories,
• ownership of Git object directories,
• server logs from the Git hosting service.

If the remote is managed by a hosting platform, check the service status or contact the repository administrator.

A Practical Workflow

From the client side, you can still gather evidence cleanly:

git push origin main

If it fails, try a small test push:

git checkout -b push-test
git commit --allow-empty -m "Test push"
git push origin push-test

If the test push also fails with the same unpack error, that strongly reinforces the diagnosis that the remote cannot write temporary pack data. If the test push works, compare branch protections, hooks, and remote policies for the original branch.

Common Pitfalls

• Treating this as a normal branch-creation issue instead of a remote repository write failure.
• Retrying blindly without checking remote disk space or permissions.
• Assuming success on a new branch proves the server is healthy.
• Blaming the local clone immediately when the error text clearly points to remote unpacking.
• Ignoring hosting-platform logs, which usually contain the most useful diagnostic detail.

Summary

• 'unable to create temporary object directory is primarily a remote-side failure.'
• The usual causes are disk space, permissions, quotas, or repository filesystem issues.
• Creating a new branch can mask the problem, but it does not fix the root cause.
• Verify the local repository briefly, then inspect the remote environment or hosting logs.
• Use a small test push only as a diagnostic step, not as the final solution.