Clone hook?

[Stephen Rasku]

We have converted one team at work from CVS to Mercurial.  We
originally believed that all the code was isolated but there is one
include directory that is used by other teams in the company.
Although we are aware of drawbacks to this situation, it has been
decided that that specific directory will remain in CVS.  Is there a
way to run a "cvs checkout" when cloning a repository?  There doesn't
seem to be a "clone" hook.  Does such a thing even make sense?

I can have the developer manually run the checkout when cloning the
directory but if there are better ideas I'd like to hear them.

...Stephen