Rename committer

gistfile1.txt

git filter-branch --commit-filter '
        if [ "$GIT_AUTHOR_EMAIL" = GIT_AUTHOR_EMAIL ];
        then
                GIT_AUTHOR_NAME="kf";
                GIT_COMMITTER_NAME="kf";
                GIT_AUTHOR_EMAIL="[email protected]";
                GIT_COMMITTER_EMAIL="[email protected]";
                git commit-tree "$@";
        else
                git commit-tree "$@";
        fi' HEAD