$ git clone -n https://src.fedoraproject.org/rpms/libnbd.git /var/lib/mock/f41-build-1066360-19556/root/chroot_tmpdir/scmroot/libnbd
Cloning into '/var/lib/mock/f41-build-1066360-19556/root/chroot_tmpdir/scmroot/libnbd'...
$ git fetch origin f177c4d92adac721224a4ee309c4ff816e441927:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnbd
 * [new ref]         f177c4d92adac721224a4ee309c4ff816e441927 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f177c4d Add BR glibc-utils for libc_malloc_debug.so.0