How to force explicit user info

From: Santi Béjar <sbejar@gmail.com>
Date: Mar 5, 2008, 13:39 UTC
Message-ID: <8aa486160803050539p4c443302nc322241d59fe9374@mail.gmail.com>

Hi  *,

  how can I forbid the gecos info and always force git to ask for an
explicit user.name and user.email?

  I use a different email for personal projects and for work projects,
using the same machine. So I set user.email locally in each
repository. But when I forget setting this I get
userid@hostname.(none) as the email. Is there a way to just die and
ask for this info (maybe user.AlwaysExplicit or something like that)?

  Thanks

  Santi