Change committer name and e-mail

gistfile1.sh

git filter-branch --commit-filter '
        if [ "$GIT_AUTHOR_NAME" = "original_commiter" ];
        then
                GIT_COMMITTER_NAME="New Committer";
                GIT_AUTHOR_NAME="New Committer";
                GIT_COMMITTER_EMAIL="[email protected]";
                GIT_AUTHOR_EMAIL="new.email.com";
                git commit-tree "$@";
        else
                git commit-tree "$@";
        fi' HEAD