$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-groupoids.git /var/lib/mock/f38-build-side-42-init-devel-925506-28744/root/chroot_tmpdir/scmroot/gap-pkg-groupoids
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-925506-28744/root/chroot_tmpdir/scmroot/gap-pkg-groupoids'...
$ git fetch origin 71cd4d8d8d8b0fe8291b8470e92afedbfffd8688:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-groupoids
 * [new ref]         71cd4d8d8d8b0fe8291b8470e92afedbfffd8688 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71cd4d8 Use the %gap_arches macro.