So, if I understand you correctly, you think we should unpublish
that
whole outdated page about Using git (with the non-available git-bzr-ng,
https://inkscape.org/en/develop/using-git-repositories/), and just
replace that sentence on the
https://inkscape.org/en/develop/getting-started/ page by the
instructions and the caveat above (plus a link to git documentation,
probably), assuming that someone who explicitly wants to use git already
knows about it?
I think that should be fine.
Do you have a link to a corresponding bug report for the user branch
creation (so others will be able to follow up on it)?