$ git clone -n https://gitee.com/wency_cn/mdadm.git /var/lib/mock/dist-an23-build-492813-74562/root/chroot_tmpdir/scmroot/mdadm
Cloning into '/var/lib/mock/dist-an23-build-492813-74562/root/chroot_tmpdir/scmroot/mdadm'...
$ git fetch origin e81423ebd390aa8fbf1a842173f2d6b97faf2e9c:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/mdadm
 * [new ref]         e81423ebd390aa8fbf1a842173f2d6b97faf2e9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e81423e Update code from upstream