This just popped up for us today on one older Rails app that has some dependencies that link to a
git://github.com repo address. It was functioning as of a week or so ago but just stopped today during a routine build. I verified it myself by manually trying to clone a public repo:
git clone git://github.com/thoughtbot/griddler.git
That hangs for a couple minutes then times out. But if you clone the
https protocol version of that repo it works fine.
I couldn’t find any documentation or news about sunsetting the git protocol or other forum posts.