Github: Using multiple forks/clones in new repository (long)
===

I'm obviously new to GitHub, and want to make sure I do things right before I dive in.

I want to create a new repository that uses forks/clones from 2 existing projects.
The existing projects are not mine.

So let's say the repo's I want to use are called Repo A from developer 'Da' and Repo B from developer 'Db'

I would fork Repo A, then clone it
I would fork Repo B, then clone it

Here is where it gets fuzzy - I now want to merge the 2 into a new Repo (C).

This is where I get lost - not just regarding how to do this, but more regarding what do I push back up to the forked repos? I assume Repo A doesn't want the Repo C stuff? Or does it?

Also, how do you put the licensing info, and 'credit' to the original developers in Repo 'C' ?

Any help is appreciated. I tried searching for it, but could not find a clear answer.

