$ git clone -n https://gitee.com/wenyuzifang/tmux.git /var/lib/mock/dist-an23-build-481952-74252/root/chroot_tmpdir/scmroot/tmux
Cloning into '/var/lib/mock/dist-an23-build-481952-74252/root/chroot_tmpdir/scmroot/tmux'...
$ git fetch origin 8d70147228a60640a316dad2220bbfd0df89a021:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tmux
 * [new ref]         8d70147228a60640a316dad2220bbfd0df89a021 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d70147 Update code from upstream