The gerrit builds for Orbit now saves the p2 repo to make it easier to test changes before submitting (config change link). This p2 archive only contains the packages of the orbit-recipes git repo, it does not include the contents of the last good CVS build and this build is not signed.
On successful builds, Jenkins will post a message to gerrit with a link to the p2 repo location. See an example below.
I hope this is useful to others. It has helped me test a multi-platform change.