$ docker build -t hs-oauth-quickstart:latest git://github.com/HubSpot/oauth-quickstart-nodejs.git
[+] Building 75.3s (1/1) FINISHED docker:desktop-linux
=> ERROR [internal] load git source git://github.com/HubSpot/oauth-quickstart-nodejs.git 75.2s
------
> [internal] load git source git://github.com/HubSpot/oauth-quickstart-nodejs.git:
0.070 Initialized empty Git repository in /var/lib/docker/overlay2/bw1aju8fykq7oijwa7bq6dinh/diff/
75.21 fatal: unable to connect to github.com:
75.21 github.com[0: 140.82.114.3]: errno=Connection refused
75.21
------
ERROR: failed to solve: failed to read dockerfile: failed to load cache key: error fetching default branch for repository git://github.com/HubSpot/oauth-quickstart-nodejs.git: exit status 128