Proposal: sharing .git/config

Hi,

I have this itch where I want to share my remotes config between
machines.  In my fork, I should be able to specify where my upstream
sources are, so remotes get set up automatically when I clone.  There
are also other things in .git/config that would be nice to share, like
whether to do a --word-diff (why isn't it a configuration variable
yet?) on the repository.  The only problem is that I have no clue how
to implement this: I'm currently thinking a special remote ref?

Ram