It’s relatively easy to install GIT on XBMC Live, but I didn’t find it well documented anywhere. Login to your XBMC machine console — either via SSH / Putty or directly from the machine (Ctrl+Alt+F2). After you are logged in, run the following command which will install the git utility:
sudo apt-get update sudo apt-get install git-core
You may need to enter your root password (default password is ‘xbmc’). The system will likely prompt you to install some other required resources. Press ‘Y’ to install those resources.