I'm on debian (having OCE 0.6.9 ATM), so I downloaded the source package from the ubuntu ppa daily builds repository and unpacked and built it on debian manually - just 3 commands to download/unpack/build. Since debian and ubunutu are very compatible, it was that simple. If there is no ready source-rpm then you will have more work to get a rpm for Fedora compiled. Maybe it is easier to just compile OCC from upstream sources locally...
About the sketcher workflow: I just learned about the carbon copy feature, which also allows to stack sketches on each other. I haven't tried if it behaves better or worse then my current workflow, but I think it looks promising.
What I would really like to see, however, is the possibility to give the lines in a sketch names, so that I can reference them from other sketches regardless of the full sketch-geometry.