$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-singular.git /var/lib/mock/f39-build-1569279-37705/root/chroot_tmpdir/scmroot/gap-pkg-singular
Cloning into '/var/lib/mock/f39-build-1569279-37705/root/chroot_tmpdir/scmroot/gap-pkg-singular'...
$ git fetch origin fc2097a80e635f0926812f9d819bf6dc77b5452a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-singular
 * [new ref]         fc2097a80e635f0926812f9d819bf6dc77b5452a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc2097a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild