There are a number of repositories associated with QMachine, and they are all being transferred to the QMachine organization on GitHub.
The main project repository is the best place to start with development. It is structured as a superproject, which means that cloning it requires cloning its submodules, too:
$ git clone --recursive https://github.com/qmachine/qmachine.git
The source code for a very incomplete Python package is available at https://github.com/qmachine/qmachine-python.