Querying Git for the path to the system config file

Hi,

I was in need to find out the path to the system-wide config file that
Git is using. I need to do this in a platform-independent way (Linux,
Mac OS X, Windows). What I came up with is

$ GIT_EDITOR=echo git config --system --edit

to trick Git into printing the path instead of opening the file in an editor.

Just wondering, is there a less hacky way to do that?

-- 
Sebastian Schuberth