What is the working directory for post-update hook?

The document root of my website has a git repository under it (in the 
standard .git subdirectory) and want a post update hook to checkout the 
contents (so the web server sees it!) 

I will be pushing to it via ssh.

Does this mean that the post-update hook with be run with a working directory 
of the web site's document root? or something relative (such as GIT_DIR) so 
that I don't have to do a specific cd to an absolute path.


-- 
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
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