For the records, I've been happy to see some work on wiki documentation, but if a guide for SVN checkout conversion appeared I've missed it. I tried to do 1) checkout of compat, 2) copy of old checkout over new one, and 3) git stash / git pull / git stash pop as suggested in https://www.mediawiki.org/wiki/Bugzilla/Fields , but git pull claims everything is up to date and while I get my files back the checkout is broken. Hence, still using last SVN version (+ the https hack).
Nemo