Trim last commit

By accident, I pushed a commit with a real email address which should be kept private. It is the last, non-drupal.org email-identified commit (b57e38833a25eca8f9dfa531f96aa9bdd495cc8c) of the git.drupal.org:project/tagged_systemqueue.git repo. I've tried force push after deleting releases, switching branches and all sorts of things, but no avail, since it had a published release :(
I need the email address to be the drupal.org provided, private email and user. Sorry for the inconvenience due to my mistake.
TIA.