I created a Dashboard template which is available on GitHub Stats Dashboard(https://grafana.net/dashboards/1559). Download the dashboard and select from the Grafana menu -> Dashboards -> Import
This dashboard is a starting point to help you get started with graphing your GitHub Repos. Please let me know if you have any changes you would like to see in the dashboard, so I can update Grafana site as well.
Figure A-2: GitHub Grafana Dashboard