Does the default theme for Ubuntu (Ambiance) have an official git repository?
I want to modify it adding my tweaks, and it already has a git repository I choose to take it as start repository.
Note: it's not a git repo but a bzr repo; you can branch the project this way:
sudo apt-get install bzr bzr branch lp:ubuntu-themes
Alternatively a quick way to get the source is:
apt-get source light-themes
Update: How to convert the ubuntu-themes bzr repo into git
Once installed, the following commands will create a working git repo:
$ git lp init --fetch lp:ubuntu-themes $ cd ubuntu-themes $ git lp branch my_dev
Then all you have to do is to push to your github repo (See Pushing to a remote)
I did the operation myself, here's my git repo containing ubuntu-themes.