$ git clone -n https://gitee.com/mgb01105731/libnbd_2.git /var/lib/mock/dist-an23.3-build-419075-72883/root/chroot_tmpdir/scmroot/libnbd_2
Cloning into '/var/lib/mock/dist-an23.3-build-419075-72883/root/chroot_tmpdir/scmroot/libnbd_2'...
$ git fetch origin b75e4661c5008cbe05ed48d2f248141c36cadfe3:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/libnbd_2
 * [new ref]         b75e4661c5008cbe05ed48d2f248141c36cadfe3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b75e466 Update to 1.20.3 from 1.18.5