If Windows/MacOS doesn't ship git by default, then yes, that should be included. On Linux, the people who are running Linux From Scratch can probably infer what the problem is.
I don't know about these days, but at some point neither Debian or Ubuntu Server shipped with Git. You can still find tutorials that start with apt-get update and apt-get install git-core
I don't know about these days, but at some point neither Debian or Ubuntu Server shipped with Git. You can still find tutorials that start with apt-get update and apt-get install git-core