script para alterar email do autor dos commits git

gistfile1.txt

#!/bin/bash

OLD_EMAIL="oldmail@email.com"
NEW_EMAIL="newmail@email.com"

# Verify that the old email exists in the commit history
if git log --all --grep="$OLD_EMAIL" --author="$OLD_EMAIL" --oneline --quiet; then
  # Rewrite the Git history
  git filter-branch --env-filter "
    if [ \"\$GIT_AUTHOR_EMAIL\" = \"$OLD_EMAIL\" ]; then
      export GIT_AUTHOR_EMAIL=\"$NEW_EMAIL\"
    fi
    if [ \"\$GIT_COMMITTER_EMAIL\" = \"$OLD_EMAIL\" ]; then
      export GIT_COMMITTER_EMAIL=\"$NEW_EMAIL\"
    fi
  " --tag-name-filter cat -- --branches --tags

  echo "Git history rewritten. Please review changes and force-push using:"
  echo "git push origin --force"
else
  echo "No commits found with the email $OLD_EMAIL."
fi