Asterisk 12.0.0 has been released and I have prepared RPMs for Fedora 19 & 20. Get them from the mss-testing channel of the Fedora & Enterprise Linux RPM Repository.
With this release, I have increased the level of subpackaging, splitting out the lesser used features of Asterisk to trim down the core installation. See the spec file I used if you are interested in the details. This file is based in large part on the great work of the upstream Fedora packagers.