See How do I update workgroup pages using SVN?
Once you have an account and access, you can check out a tree with:
svn co https://repo.eecs.berkeley.edu/svn/projects/chess/pret/trunk/pretThe pret repo is large. To get just the website use:
svn co https://repo.eecs.berkeley.edu/svn/projects/chess/pret/trunk/pret/web pretweb