$ git clone -n https://gitee.com/wenyuzifang/tmux.git /var/lib/mock/dist-an23-build-466800-73998/root/chroot_tmpdir/scmroot/tmux
Cloning into '/var/lib/mock/dist-an23-build-466800-73998/root/chroot_tmpdir/scmroot/tmux'...
$ git fetch origin 432560d756ba631007a27c30392bbbba0ce30666:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tmux
 * [new ref]         432560d756ba631007a27c30392bbbba0ce30666 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 432560d Update code from upstream