$ git clone -n https://src.fedoraproject.org/rpms/viking.git /var/lib/mock/f41-build-859888-168711/root/chroot_tmpdir/scmroot/viking
Cloning into '/var/lib/mock/f41-build-859888-168711/root/chroot_tmpdir/scmroot/viking'...
$ git fetch origin 6a76993c5bdf362d891aab02cb9adaa4d0c1c08d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/viking
 * [new ref]         6a76993c5bdf362d891aab02cb9adaa4d0c1c08d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a76993 Do not build on i686 architecture