$ git clone -n https://gitee.com/wency_cn/libnbd_1772056739.git /var/lib/mock/dist-an23-build-515055-75118/root/chroot_tmpdir/scmroot/libnbd_1772056739
Cloning into '/var/lib/mock/dist-an23-build-515055-75118/root/chroot_tmpdir/scmroot/libnbd_1772056739'...
$ git fetch origin b0e126893fd8bbb86ef8aa4e6e0c14af938b3568:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libnbd_1772056739
 * [new ref]         b0e126893fd8bbb86ef8aa4e6e0c14af938b3568 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0e1268 Update code from upstream