$ git clone -n https://src.fedoraproject.org/rpms/libvirt.git /var/lib/mock/f40-build-2393374-60531/root/chroot_tmpdir/scmroot/libvirt
Cloning into '/var/lib/mock/f40-build-2393374-60531/root/chroot_tmpdir/scmroot/libvirt'...
$ git fetch origin 9ef5501a94ae68617c2e9642870ad955533c646a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt
 * [new ref]         9ef5501a94ae68617c2e9642870ad955533c646a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ef5501 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild