I still don't understand, why was abandoned SVN and is there some git instead.
It is as simple as follows:
SVN was perfect for Pywikibot community, but not for Mediawiki developers. They have much more complex processes that are not served well enough by SVN.
MW devs decided to change to git, and asked us about Pywikibot.
We agreed to use SVN further because it is good. Other projects also changed to git.
Then somebody somewhere decided to switch off SVN at Foundation's servers because it takes electricity or takes much room in the office or for some other reason and anyhow, nobody uses it but Pywiki community, so it is not used and is not neccessary.
We had the choice to move to an outer SVN server and leave the Foundation's environment or to switch to git and so we gave up.
That's a nice story. But I am glad to hear that I am not the only one who is unhappy with this and so I am not some alien from Tau Ceti.