cli: Attempt to get cluster details from git before using default
cli: Attempt to get cluster details from git before using default

Closes #1999

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

flynn/flynn,benbjohnson/flynn,rikur/flynn,rikur/flynn,lmars/flynn,lmars/flynn,benbjohnson/flynn,flynn/flynn,rikur/flynn,flynn/flynn,rikur/flynn,lmars/flynn,philiplb/flynn,philiplb/flynn,philiplb/flynn,benbjohnson/flynn,philiplb/flynn,lmars/flynn,flynn/flynn,lmars/flynn,benbjohnson/flynn,benbjohnson/flynn,rikur/flynn,benbjohnson/flynn,rikur/flynn,philiplb/flynn,flynn/flynn