Update Your Git Commit Email Address Before Pushing to Remote Repository

Here's a quick way to update commit author email and display name for previous commits in a local project.

Two things worth mentioning before using this:

1. If you change your email, it might no longer count as contributions to your GitHub/GitLab profile. But as long as you keep the old email as a hidden email connected to your account, it should work.

2. Remember that rewriting history in shared projects is a bad idea. Especially when working in a collaborative environment with other people. But for old local projects that you want to upload to a public Git repository, this method could be useful to hide some personal information.

Let's use git-filter-repo which is a modern replacement to git filter-branch and can be installed via package managers or by following the official installation guide.

Once installed, we can update the email like this:

git-filter-repo \
--email-callback 'return email.replace(b"old@email.com", b"new@email.com")'

If you also want to update your name, you can run this command:

git-filter-repo \
--name-callback 'return name.replace(b"OldName", b"NewName")' \
--email-callback 'return email.replace(b"old@email.com", b"new@email.com")'

Credit: StackOverflow