$ git clone -n https://src.fedoraproject.org/rpms/aardvark-dns.git /var/lib/mock/f45-build-39636-750/root/chroot_tmpdir/scmroot/aardvark-dns
Cloning into '/var/lib/mock/f45-build-39636-750/root/chroot_tmpdir/scmroot/aardvark-dns'...
$ git fetch origin 706e793ff9a4747b7518b733a24b33a58eeed43e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aardvark-dns
 * [new ref]         706e793ff9a4747b7518b733a24b33a58eeed43e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 706e793 Update to 2.1.0 upstream release