$ git clone -n https://src.fedoraproject.org/rpms/arianna.git /var/lib/mock/f42-build-3282349-41398/root/chroot_tmpdir/scmroot/arianna
Cloning into '/var/lib/mock/f42-build-3282349-41398/root/chroot_tmpdir/scmroot/arianna'...
$ git fetch origin 7054e224295ef24a7f3ff5b62702473576b6d371:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arianna
 * [new ref]         7054e224295ef24a7f3ff5b62702473576b6d371 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7054e22 Rebuild for ppc64le enablement