Git: change committer info for all commits in a branch

git_change_committer_info

git filter-branch --commit-filter '
        if [ "$GIT_COMMITTER_NAME" = "Alex" ];
        then
                GIT_COMMITTER_NAME="Alexander Makarov";
                GIT_AUTHOR_NAME="Alexander Makarov";
                GIT_COMMITTER_EMAIL="sam@rmcreative.ru";
                GIT_AUTHOR_EMAIL="sam@rmcreative.ru";
                git commit-tree "$@";
        else
                git commit-tree "$@";
        fi' HEAD