Changes identity in git commits creating new history.
In shell script set your old email, correct username and correct email.
To push new commit history run:
git push --force-with-lease --tags origin 'refs/heads/*'
Based on - https://stackoverflow.com/a/30737248/19638034
Fixes MacOS DS store files in repo.
Run script and add **/.DS_Store in .gitignore.
Commit and push changes.
Based on - https://stackoverflow.com/a/38797342/19638034
Shows beautiful commit tree
Based on - https://git-scm.com/docs/pretty-formats