CC-BY-SA is an odd choice for a code license. From the Creative Commons FAQ:
Unlike software-specific licenses, CC licenses do not contain specific terms about the distribution of source code, which is often important to ensuring the free reuse and modifiability of software.
In the case of cataclysm-dda, they state the following in their README.md:
The code and content of the game is free to use, modify, and redistribute for any purpose whatsoever.
This statement, combined with CC-BY-SA makes it fine for Fedora without any ambiguity. I'm reluctant to put it in the main software license list, because there may be cases where code under CC-BY-SA would have distribution concerns.
Though, I would note that cataclysm-dda seems to be already packaged and in Fedora, so you may not need to work on this one. :)
Thanks,
Tom