Discussed at http://moodle.org/mod/cvsadmin/view.php?conversationid=1261:

This is a feature request to automatically generate a file of CVS commit authors that could be used by git-cvsimport? The format is as follows:
skodak=Petr Skoda <skodak@moodle.org>
mudrd8mz=David Mudrak <david.mudrak@gmail.com>
...

Developers using git to track Moodle CVS could use this file during CVS import so the real names appears in the git commit description instead of current
Author: skodak <skodak>

If Catalyst use such file for their moodle-r2.git, we have very nice git-ish mirror of CVS tree.