Change the author name/email of a single commit

change_author.sh

#!/bin/bash
# Change the Author Name/Email of a single commit

git filter-branch --commit-filter '
  if [ "$GIT_COMMIT" = "commit-hash-here" ]; then
    GIT_AUTHOR_NAME="New Author Name";
    GIT_AUTHOR_EMAIL="New Author Email";
    git commit-tree "$@";
  else
    git commit-tree "$@";
  fi' HEAD