$ git clone -n https://gitee.com/wenyuzifang/virt-viewer.git /var/lib/mock/dist-an23-build-470318-74061/root/chroot_tmpdir/scmroot/virt-viewer
Cloning into '/var/lib/mock/dist-an23-build-470318-74061/root/chroot_tmpdir/scmroot/virt-viewer'...
$ git fetch origin cbfae5c2b5ee0155abdcfaadc1b9533c765e8fa2:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/virt-viewer
 * [new ref]         cbfae5c2b5ee0155abdcfaadc1b9533c765e8fa2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbfae5c Update code from upstream