That's funny, I can export a whole list of patches to the program I'm working on, even though I have never used patches to create and modify that program; I made the changes required directly to the source, and committed those changes as they were done.
And again, it doesn't really matter how Red Hat package those changes. The modifications originally (in all probability) was done to the checked out source.
- In simple cases, someone might have opted to do the change directly to an existing patch, but that is hardly the norm.