$ git clone -n https://src.fedoraproject.org/rpms/libvirt.git /var/lib/mock/f41-build-side-1-2647716-27311/root/chroot_tmpdir/scmroot/libvirt
Cloning into '/var/lib/mock/f41-build-side-1-2647716-27311/root/chroot_tmpdir/scmroot/libvirt'...
$ git fetch origin 156ce5b5c7702b26f47b2059ca9e6751f9f1593b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt
 * [new ref]         156ce5b5c7702b26f47b2059ca9e6751f9f1593b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 156ce5b libvirt-10.7.0-1