[tei-council] repo

Hugh writes

You’ll probably be better off if you grab a new clone of the data rather than trying to merge the old one.

For avoidance of doubt, and for the benefit of those still struggling with gittery, could you spell out what that means in terms of command line commands? I assume I need to clone a new version of the repo if I want to change things in the trunk source (e.g. answer a ticket or two), having further assumed that the freeze on source updates is no longer in effect? And lastly (sorry to ask so many stupid questions) do I also need to refresh my current P5-Pure branch repo ?