[Users] Correct way to use updates-testing?

Hello, what should I do to accomplish what in subject? Also, I currently have fedora 18 and ovirt 3.2.1 (with ovirt-release-fedora-5-3.noarch). I see that at http://resources.ovirt.org/releases/ there is also ovirt-release-fedora-6-1.noarch.rpm released on 7th of May. WHat is that for? How to catch it other than manually? In my current /etc/yum.repos.d/ovirt.repo I don't see any updates-testing repo to enable.... Thanks in advance, Gianluca