If anyone needs assistance with fixing a FTBFS package, please don’t hesitate to ask on fedora-devel (or in the comments to this post). No one knows how to fix every build failure, but most of the time, it’s something someone else has seen before. I’m willing to contribute advice, patches, or even commits and builds, if I can (no promises*), and I’m sure I’m not alone. This doesn’t just apply to packages you own, either. If you use or otherwise care about a package that’s FTBFS and the maintainer hasn’t started on it or needs help, ask about that too.
*Offer subject to time and knowledge constraints, no warranty stated or implied, IANAL, void where prohibited, some cars not for use with some sets.