From Fedora Project Wiki

Owner

Rahul Sundaram (mether)

Rationale

To avoid post import cleanup like the following

https://www.redhat.com/archives/fedora-devel-list/2009-August/msg00563.html

I propose that we add a section to Packaging/SourceURL that recommends packagers to pick the best source.

This will be a tip in the SourceURL page:

Idea.png
Smallest Compressed Archive
If the upstream source archive is available in multiple compressed formats that our tools can decompress it's best to use the one that is smallest in size. This ensures the smallest source rpm to save space on the mirrors and downloads of source RPM packages.