getting source using git

[Steve]

For some time now I've been wanting better investment tracking ability in GnuCash staring with stock lots and eventually having some way to track options. Inspired by the recent "Chapter 8 - investment accounts" thread, I decided to jump in but I seem to have tripped over the bottom rope.

Starting with the instructions at http://wiki.gnucash.org/wiki/Building I decided to use git and followed the link to http://wiki.gnucash.org/wiki/Git but:

$ pwd
/home/steve/Development/steve

$ git clone git://github.com/Gnucash/gnucash.git --verbose
Initialized empty Git repository in /home/steve/Development/steve/gnucash/.git/
github.com[0: 192.30.252.131]: errno=Connection refused
fatal: unable to connect a socket (Connection refused)

I'm new to git but I found the --verbose flag which seems to indicate some kind of authentication is required.
After a bit of research I decided that I might need to create an account on github but I got the same results.

Clearly I'm missing something.

I'm running on up-to-date CentOS 6 VMware virtual machine on a Windows 7 box.

Steve.