Thanks partly to my being home sick a couple of days, and having nothing better to do... :)
Just pushed an initial batch of kde-4.12.0 rpms for f19 to our kde-unstable (footnote) repo. I similarly updated kde-unstable/f20 a couple of days ago too.
Enjoy.
Per https://fedoraproject.org/wiki/SIGs/KDE/Update_policy
we'd very much appreciate any feedback/testing from the community to help facilitate bringing kde-4.12.x to f20 officially at some point in the (hopefully) near future.
-- Rex
footnote: see https://fedoraproject.org/wiki/SIGs/KDE/Testing for details on how to use/access our 3rd party kde repos.