Use gh cli and git to rewrite commit history and anonymize commits

GHAnonymizer.sh

# pip3 install git-filter-repo
gh repo list --json name -q '.[].name' --limit 1000 | while read -r repo; do                                      ─╯
  gh repo clone "$repo"
  cd "$repo"
  git-filter-repo --email-callback 'return email.replace(b"old@email.com", b"new@email.com")'
  git push
  cd ..
done