rw e420s ~ % git archive --remote ssh://git@github.com/blah/blah HEAD -v
Invalid command: 'git-upload-archive '/blah/blah''
  You appear to be using ssh to clone a git:// URL.
  Make sure your core.gitProxy config option and the
  GIT_PROXY_COMMAND environment variable are NOT set.
fatal: The remote end hung up unexpectedly