Hi,
svn? That would be even better than git. Because of the clear concept of version numbers.
Git is clear with this respect as well. Version numbers in Git are just tags, which are given to a certain commit for easier access. Visit the GitHub
release site to see all available versions including a link to the source code and download button for ZIP, TAR archives ...
I tried to get a grip on the svn repository as described here, but some how I get redirected to addon.WebsiteBaker. org.
The WB nightly build site is not maintained any more.
The WB SVN URL is: svn://isteam.dynxs.de/wb_svn/wb280/branches/2.8.x
Fine, because the zip files are very hard to track. Finding changes with diff is very hard work 
Well tracking changes with diff is quite easy and supported in both, SVN and
Git. Git blame is also a nice tool to see who has introduced changes and when.
Cheers