$ git clone -n https://gitee.com/wenyuzifang/tmux.git /var/lib/mock/dist-an23-build-464359-73881/root/chroot_tmpdir/scmroot/tmux
Cloning into '/var/lib/mock/dist-an23-build-464359-73881/root/chroot_tmpdir/scmroot/tmux'...
$ git fetch origin 590e632c016df1aaf4a4500911d353db6cd20f5b:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tmux
 * [new ref]         590e632c016df1aaf4a4500911d353db6cd20f5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 590e632 Update code from upstream