$ git clone -n https://src.fedoraproject.org/rpms/dhall-json.git /var/lib/mock/f38-build-side-42-init-devel-1096278-30070/root/chroot_tmpdir/scmroot/dhall-json
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1096278-30070/root/chroot_tmpdir/scmroot/dhall-json'...
$ git fetch origin b36056d320200b3d9c55b46456ff09ef01db0d3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dhall-json
 * [new ref]         b36056d320200b3d9c55b46456ff09ef01db0d3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b36056d disable i686 since cborg doesn't build with ghc-9.2