$ git clone -n https://gitee.com/wenyuzifang/tmux.git /var/lib/mock/dist-an23-build-466740-73981/root/chroot_tmpdir/scmroot/tmux
Cloning into '/var/lib/mock/dist-an23-build-466740-73981/root/chroot_tmpdir/scmroot/tmux'...
$ git fetch origin 57485d9ca8e0c086b43609b3935d0a5c907bfe98:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tmux
 * [new ref]         57485d9ca8e0c086b43609b3935d0a5c907bfe98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57485d9 Update code from upstream