$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-groupoids.git /var/lib/mock/f45-build-52102-907/root/chroot_tmpdir/scmroot/gap-pkg-groupoids
Cloning into '/var/lib/mock/f45-build-52102-907/root/chroot_tmpdir/scmroot/gap-pkg-groupoids'...
$ git fetch origin a05edc19e56f8d4fafb3733481fe7792788b4329:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-groupoids
 * [new ref]         a05edc19e56f8d4fafb3733481fe7792788b4329 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a05edc1 Version 1.84