You can clone with
HTTPS or Subversion.
The goal of this ticket is that the site developer.piwik.org contains all technical documentation about Piwik.
This is a follow up from developer.piwik.org project #4266
Here are the pages from piwik.org that can be moved to developer.piwik.org
See email for some links to piwik2 pages which are already converted to markdown.