We use Source Forge to host the source code repository using Mercurial DVCS.
Debian/Ubuntu Linux - Terminal
$ sudo apt-get install mercurial
ryzom
.hg clone http://ryzom.hg.sourceforge.net/hgroot/ryzom/ryzom
Later, to update sources you will need to type :
hg pull && hg update
As an alternative you may want to use TortoiseHg (http://tortoisehg.bitbucket.org) to download the newest sources (especially if you run Windows).
With TortoiseHg, you will need to click right on your new empty folder and click on "TortoiseHg -> Clone" and you will get this dialog :
Source path: will be http://ryzom.hg.sourceforge.net/hgroot/ryzom/ryzom
Destination path: will be the folder where you want put all sources.
hg clone ssh://USERNAME@ryzom.hg.sourceforge.net/hgroot/ryzom/ryzom
USERNAME is your login on SourceForge.