From what I can see, there are repositories available: https://repos.fedorapeople.org/repos/...

Yes, you can install from source. See the instructions in the GitHub repo: https://github.com/stackforge/packstack

I attempted a clean install just now on a kvm virtual machine following the http://docs.openstack.org/kilo/install-guide/install/yum/content/index.html (OpenStack Installation Guide), but the process fails at the first openstack command. The RDO repo does point to f22.