$ git clone -n https://src.fedoraproject.org/rpms/ga.git /var/lib/mock/f38-build-side-42-init-devel-1089322-30044/root/chroot_tmpdir/scmroot/ga
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1089322-30044/root/chroot_tmpdir/scmroot/ga'...
$ git fetch origin a5b27ef3d8cec31dd42f7932d357855e2ed4a0db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ga
 * [new ref]         a5b27ef3d8cec31dd42f7932d357855e2ed4a0db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5b27ef Exclude %{ix86} due to bug #2142304