Pierre "I did not find a specific help on moodle Git handling for contributor like me."
That is currently the main issue that prevents a number of "small-time" moodle contributors to take the huge step of moving from CVS to GIT. We desperately need a step-by-step (not "elliptic") complete documentation, with lots of concrete examples/scenarios, to be made available in the Modle documentation wiki.
If someone knowledgeable with GIT and Moodle (but not too knowledgeable) starts that documentation I'll be happy to contribute.
Joseph