$ git clone -n https://gitee.com/wenyuzifang/tmux.git /var/lib/mock/dist-an23-build-472755-74118/root/chroot_tmpdir/scmroot/tmux
Cloning into '/var/lib/mock/dist-an23-build-472755-74118/root/chroot_tmpdir/scmroot/tmux'...
$ git fetch origin a1cc29109a7f8833bbf7591100bceb8b44c5552c:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tmux
 * [new ref]         a1cc29109a7f8833bbf7591100bceb8b44c5552c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1cc291 Update code from upstream