You have several ways to explore the latest sources for Jitsi.
Browse through the web repository
GitHub provides a way to browse the Git repository online.
Check out source code with a Git client
Using a command line client execute:
|git clone https://github.com/jitsi/jitsi.git|
Feel free to use your favorite Git client to obtain the source code from the same URL.
Check out source code using an SVN client
Using a command line subversion client excecute:
|svn checkout https://github.com/jitsi/jitsi.git|
Note that this is a read-only repository only. If you one day become a Jitsi committer you would need to switch to Git.