There needs to be a link sweep to questions/answers in SO that are pointing to http://www.kernel.org/pub/software/scm/git/docs/. Lots of google juice for git questions are pointing to these SO questions with these dead end links.
Since these are basically links to the manual, users should also look at the tag wikis to throw in the basic use case, examples, and the various flags that go with each of the Git commands.
You can rely on another third-party site to hold up and stick around with their repos, or sock that away on Stack Overflow.
Most of these don't really need the links and of the others, they could be annotated or replaced with the git call for the respective man pages.
When these pop up I always feel we need a better way of catching and dealing with it.
I am counting 300 results: http://stackoverflow.com/search?q=%22http%3A%2F%2Fwww.kernel.org%2Fpub%2Fsoftware%2Fscm%2Fgit%2Fdocs%2F%22
The bigger question is what should this be changed to?