As of a few days ago they must have changed something in the corporate proxy server at work because all of a sudden no one could push or pull to git remotes. I was getting error "fatal: unable to access [proxy server address]: Timed out"
After much frustration, it turns out there was a fairly simple solution. I had http_proxy and https_proxy environment variables set to the proxy server. If I set an environment variable "no_proxy" with the values of the domains I need to connect to with git everything works fine.