How to fix wrong username and email in git repository commits.

fix_user_and_email_in_repo.md

First change the username and email configuration for the current repository for future commits.

git config user.name "New Name Value"
git config user.email "correct@example.com"

Then fix the username and email of all the commits that already exist.

From https://www.git-tower.com/learn/git/faq/change-author-name-email.

git filter-branch --env-filter '
WRONG_EMAIL="wrong@example.com"
NEW_NAME="New Name Value"
NEW_EMAIL="correct@example.com"

if [ "$GIT_COMMITTER_EMAIL" = "$WRONG_EMAIL" ]
then
    export GIT_COMMITTER_NAME="$NEW_NAME"
    export GIT_COMMITTER_EMAIL="$NEW_EMAIL"
fi
if [ "$GIT_AUTHOR_EMAIL" = "$WRONG_EMAIL" ]
then
    export GIT_AUTHOR_NAME="$NEW_NAME"
    export GIT_AUTHOR_EMAIL="$NEW_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags