As of today, the collaborative development repository for Pure data hosted at SourceForge is now using Subversion.

You can browse the repository online via a webinterface at http://pure-data.svn.sourceforge.net/viewvc/pure-data/ or directly via https://pure-data.svn.sourceforge.net/svnroot/pure-data/

If you want to check out the repository, be sure to get-the correct branch (most likely the TRUNK); checking out everything will take quite some harddisk-space.