Re: how to access working tree from .git dir?

"Josh England" [off-list ref] writes:

In messsing around with hooks, I've discovered that not all hooks are
run in the same environment.  In particular, the current working
directory in the post-receive hook (maybe others as well) is the GIT_DIR
(.git) directory, instead of the root of the working tree (as in
pre-commit).

It is not even "instead of"; that's the only sane thing to do
for post-receive, which is in response to git-push and usually
used for a bare repository, i.e. without any work tree.