Just a quick script I made that you might have to adapt for your situation, if you want to update any commits you made on all your projects, to remove your deadname and/or old email address.

• Map your name and email address with your old ones so you can replace them easily
• Update all your commits
• Sign them again
• and add a new remote to your repositories.
• Do a quick check before confirming the operation to push force `--with-lease`