Re: [RFC] Submodules in GIT

Linus Torvalds wrote:
...

In contrast, a submodule that we don't fetch is an all-or-nothing 
situation: we simply don't have the data at all, and it's really a matter 
of simply not recursing into that submodule at all - much more like not 
checking out a particular part of the tree.

If you do not want to fetch all of the supermodule then do not fetch the
supermodule. Instead fetch only the submodules you are interested in.
You do not have to fetch the whole repository.

Regards