$ git clone -n https://src.fedoraproject.org/rpms/libgnome.git /var/lib/mock/f45-build-16302-484/root/chroot_tmpdir/scmroot/libgnome
Cloning into '/var/lib/mock/f45-build-16302-484/root/chroot_tmpdir/scmroot/libgnome'...
$ git fetch origin 1162abbc25871d9fe26170b6064dedc6843fa839:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgnome
 * [new ref]         1162abbc25871d9fe26170b6064dedc6843fa839 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1162abb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild