$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-polycyclic.git /var/lib/mock/f40-build-2278997-55302/root/chroot_tmpdir/scmroot/gap-pkg-polycyclic
Cloning into '/var/lib/mock/f40-build-2278997-55302/root/chroot_tmpdir/scmroot/gap-pkg-polycyclic'...
$ git fetch origin dfa20fc26702c1e567c77d7c25b9e2be4364d912:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-polycyclic
 * [new ref]         dfa20fc26702c1e567c77d7c25b9e2be4364d912 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfa20fc Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild