interactive-rebase

Interactive Rebase

find out the commit a point earlier than the one you want to modify
execute the command:

git rebase -i <earlier_commit>

change the text from pick to edit in the list of the commits
to change the author of the commit:

git commit --amend --author="Author Name <[email protected]>"

git rebase --continue
git push -f

References

https://stackoverflow.com/questions/3042437/how-to-change-the-commit-author-for-one-specific-commit