$ git clone -n https://gitee.com/wenyuzifang/tang.git /var/lib/mock/dist-an23-build-464335-73881/root/chroot_tmpdir/scmroot/tang
Cloning into '/var/lib/mock/dist-an23-build-464335-73881/root/chroot_tmpdir/scmroot/tang'...
$ git fetch origin 6797a731b0457642f329f5c987c06f689a555a5b:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tang
 * [new ref]         6797a731b0457642f329f5c987c06f689a555a5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6797a73 Update code from upstream