$ git clone -n https://src.fedoraproject.org/rpms/rubygem-fog-libvirt.git /var/lib/mock/f40-build-2305429-57085/root/chroot_tmpdir/scmroot/rubygem-fog-libvirt
Cloning into '/var/lib/mock/f40-build-2305429-57085/root/chroot_tmpdir/scmroot/rubygem-fog-libvirt'...
$ git fetch origin 91c273368b0eaa4e0b7276c421150e88ae802a3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-fog-libvirt
 * [new ref]         91c273368b0eaa4e0b7276c421150e88ae802a3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91c2733 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild