Change the author or several commits to be under a new author. This is useful if you accidentally commit under a different name/email.

git-change-commit-author.sh

# found in http://stackoverflow.com/questions/750172/change-the-author-of-a-commit-in-git#answer-870367
# you may get errors
# if so just use `--force`
git filter-branch --env-filter '
if [ "$GIT_COMMITTER_NAME" = "<Old name>" ]; then
 GIT_COMMITTER_NAME="<New name>";
 GIT_COMMITTER_EMAIL="<New email>";
 GIT_AUTHOR_NAME="<New name>";
 GIT_AUTHOR_EMAIL="<New email>";
fi' -- --all