The python3-fedfind RPM requires both Python 2 and Python 3. Except in very special circumstances, there is no need for one package to drag in both Python stacks. Usually, this is a packaging error: for example, a stray "/usr/bin/python" shebang in a Python 3 package can introduce a Python 2 dependency. Please split your package, or remove the stray dependencies. There is a section on shebangs in the Python RPM Porting Guide [0] which covers this issue. It's ok to do this in Rawhide only, however, it would be greatly appreciated if you could push it to Fedora 25 as well. If anything is unclear, or if you need any kind of assistance, you can ask on IRC (#fedora-python on Freenode), or reply here. We'll be happy to help investigating or fixing this issue! [0] http://python-rpm-porting.readthedocs.io/en/latest/application-modules.html#are-shebangs-dragging-you-down-to-python-2
This was actually just the result of mistakenly putting a python2 package in one of the package's python3 dependency globals. fixed in 3.1.3-2 (will land on Rawhide shortly, and updates are out for other branches).