Till v3.7.0-rc.0 release oc binaries were published in github release page  but with 3.7.0 the location has changed and causing minishift start --openshift-version v3.7.0 to fail.
From Minishift side we can change the code to point it to the new
location but the new location is difficult to guess programmatically because It seems to contain a build id "1032" which makes it hard for third parties to determine.
If we can not predict the location then Minishift users can
not use a new version of Origin without code changes in Minishift which
is not desirable.