$ git clone -n https://src.fedoraproject.org/rpms/libvirt.git /var/lib/mock/f41-build-side-1-2800390-32800/root/chroot_tmpdir/scmroot/libvirt
Cloning into '/var/lib/mock/f41-build-side-1-2800390-32800/root/chroot_tmpdir/scmroot/libvirt'...
$ git fetch origin e184d967ac3dceebd393582624df70fb65743d72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt
 * [new ref]         e184d967ac3dceebd393582624df70fb65743d72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e184d96 libvirt-10.8.0-1