$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-design.git /var/lib/mock/f38-build-side-42-init-devel-749500-27661/root/chroot_tmpdir/scmroot/gap-pkg-design
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-749500-27661/root/chroot_tmpdir/scmroot/gap-pkg-design'...
$ git fetch origin e5d53982469a0edff78b2887fa9b2db796318dd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-design
 * [new ref]         e5d53982469a0edff78b2887fa9b2db796318dd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5d5398 Version 1.8.