While https://developer.blender.org doesn't display a prominent readme,
other 3rd party hosting services do (github/gitlab/bitbucket).
People may stumble on these sites (searching `blender git` here, 2 of the top 4 results link to github for eg),
in these cases it's nice if they're directed to official development channels and have some basic useful information.
Suggested text (taken from blender.org, roughly following https://github.com/KDE/krita as a template).
{P951}
Screenshot from github: {F6939114}