change author info on already existing commits

change_author_info.md

Taken from https://docs.github.com/en/github/using-git/changing-author-info

git clone --bare https://github.com/user/repo.git
cd repo.git

#!/bin/sh
git filter-branch --env-filter '

OLD_EMAIL="your-old-email@example.com"
CORRECT_NAME="Your Correct Name"
CORRECT_EMAIL="your-correct-email@example.com"

if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
then
export GIT_COMMITTER_NAME="$CORRECT_NAME"
export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL"
fi
if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ]
then
export GIT_AUTHOR_NAME="$CORRECT_NAME"
export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags

# save the above script and make it executable and run it
chmod +x <filename>.sh
./<filename>.sh

git push --force --tags origin 'refs/heads/*'

cd ..
rm -rf repo.git