$ git clone -n https://src.fedoraproject.org/rpms/libvirt.git /var/lib/mock/f41-build-3150088-40538/root/chroot_tmpdir/scmroot/libvirt
Cloning into '/var/lib/mock/f41-build-3150088-40538/root/chroot_tmpdir/scmroot/libvirt'...
$ git fetch origin b14bf469da6bd14dbe307a29fcf535fd1a8ad751:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt
 * [new ref]         b14bf469da6bd14dbe307a29fcf535fd1a8ad751 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b14bf46 libvirt-10.6.0-6.fc41