extras build system

[AGHEMO Danilo]

On Mon, 2005-04-11 at 15:36 +0530, Rahul Sundaram wrote:
> >this may be a faq, but... how can i replicate the build system on my
> >server for testing purposes? maybe the sources for the build system are
> >in the cvs? where?
> >regards,
> >danilo
> http://cvs.fedora.redhat.com/extras.shtml

Uh, oh... I've given a glance to that already, but I can't see any
mention to mach or other kind of chrooting. 

What I would like is to replicate the whole build system, so that I can
move from my own mach-based build system to the fedora build system.
Some of the packages I have are of common interest (e.g. shorewall), but
this is not true for other pachakges (e.g. various custom tools to
manage my network at office). That's why I would like to experiment with
the complete build environment.

I've read the old fedora.us build sytem stuff, but... is there any up-
to-date howto out there?