pathway rawhide..branched

[Zoltan Kota]

Hi,

Is there an automatic/smooth and/or recommended way to switch from rawhide 
to the branched-devel (when branching is being done) dist? 
E.g. Now I can upgrade my F14 to devel. Later when F15 is branched I would 
like to follow F15 and not devel. Is it possible automatically or I need 
to tweak my system manually. Last time I missed the 'branching point' and 
I got the updates from rawhide.
Sorry if I missed some trivial info somewhere!

Zoltan