Source code of OpenUAT is publicly available either on the Sourceforge file sections for each of the official releases or via the (read-only) git repository. The full repository can be cloned anonymously via HTTP:
git clone http://git.openuat.org/git/openuat.git
Registered developers can clone the repository via SSH (managed by gitosis) after their respective public keys were registered to be able to push to the main repository:
git clone gitosis@git.openuat.org:openuat
Note for Windows users: MsysGit works in combination with plink.exe from Putty (and therefore with SSH agent authentication), but set-up is slightly involved: