A simple wrapper around socat to use as a git proxy command

gitproxy-socat

#!/bin/sh
# Use socat to proxy git through an HTTP CONNECT firewall.
# Useful if you are trying to clone git:// from inside a company.
# Requires that the proxy allows CONNECT to port 9418.
#
# Save this file as gitproxy somewhere in your path (e.g., ~/bin) and then run
#   chmod +x gitproxy
#   git config --global core.gitproxy gitproxy
#
# More details at http://tinyurl.com/8xvpny

# Configuration. Common proxy ports are 3128, 8123, 8000.
_proxy=proxy.yourcompany.com
_proxyport=3128

exec socat STDIO PROXY:$_proxy:$1:$2,proxyport=$_proxyport

another simple workaround (src) :

git config --global url.https://github.com/.insteadOf git://github.com/

Nice solution!

it doesn't work on my machine. I still need to set ~/.ssh/config.