$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-hap.git /var/lib/mock/f38-build-side-42-init-devel-861121-28428/root/chroot_tmpdir/scmroot/gap-pkg-hap
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-861121-28428/root/chroot_tmpdir/scmroot/gap-pkg-hap'...
$ git fetch origin 08155f90dc71e6994f6bb2dd7b62b8369ed8bbd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-hap
 * [new ref]         08155f90dc71e6994f6bb2dd7b62b8369ed8bbd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08155f9 Version 1.54.