$ git clone -n https://src.fedoraproject.org/rpms/go2rpm.git /var/lib/mock/f40-build-1938590-25157/root/chroot_tmpdir/scmroot/go2rpm
Cloning into '/var/lib/mock/f40-build-1938590-25157/root/chroot_tmpdir/scmroot/go2rpm'...
$ git fetch origin deb6ba8854941d05f5bbfb5de807d91a5a92f2cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/go2rpm
 * [new ref]         deb6ba8854941d05f5bbfb5de807d91a5a92f2cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at deb6ba8 Merge branch 'rawhide' into f40