The Varnish Git repository is available through the following methods:
- Trac Source Browser with nifty syntax highlighting
- Read-only Git access: git clone git://git.varnish-cache.org/varnish-cache
- Our mirror on Github
- Read-write Git access (developers only): git clone email@example.com:varnish-cache
For a good introduction to Git you should take a look at Everyday Git on github (previously on kernel.org).