Add another author to the latest commit. Since this command rewrites the Git history, `--force` will be needed when pushing next time.
Insert an additional author to the last Git commit
git-coauthor <co-author> <co-author-email>
Add a co-author to the last commit
The username of the co-author you want to add.
The email address of the author you want to add.
$ git coauthor user firstname.lastname@example.org
Written by Jacob Herrington email@example.com