The website plonesource.org lists checkout information for Plone, Zope and add-on packages from github.
The checkout information comes in a mr.developer compatible format so that it can easily be used with buildout.
Visit the plonesource.org for usage documentation.
Handling of forks
Forks are not include but the original repositories are. The original repository is included even when the principal is not configured in the config.ini.
Generated sources.cfg http://plonesource.org/sources.cfg
Last updated timestamp http://plonesource.org/last-update.txt