You can clone with
HTTPS or Subversion.
Update to jQuery 1.5
Check out http://blog.jquery.com/2011/01/31/jquery-15-released/
for more information.
Why isn't jQuery being kept as a git submodule inside rails repo?
I believe there's still some issues with git submodules for some people's tools. They work fine for people using command-line Git, but not so good in EGit and the like.