$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-congruence.git /var/lib/mock/f45-build-9453-404/root/chroot_tmpdir/scmroot/gap-pkg-congruence
Cloning into '/var/lib/mock/f45-build-9453-404/root/chroot_tmpdir/scmroot/gap-pkg-congruence'...
$ git fetch origin d99e11c87d09c5bdc4a16887ae66ef5891add55c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-congruence
 * [new ref]         d99e11c87d09c5bdc4a16887ae66ef5891add55c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d99e11c Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild