I think that this paragraph in Packaging Guidelines / SourceURL answers the question:
Some upstream packages include patents or trademarks that we are not allowed to ship even as source code. In these cases you have to modify the source tarball to remove this code before you even upload it to the build system.
https://docs.fedoraproject.org/en-US/packaging-guidelines/SourceURL/#when-up...
The paragraph talks about code, but I imagine the same purpose would apply to binary files.
A.FI.