feat(get): add ghq.defaultHost config to resolve the default host.

url.go

@@ -139,7 +139,12 @@ func newURL(ref string, ssh, forceMe bool) (*url.URL, error) {
 			}
 		}
 		u.Scheme = "https"
+		host, err := gitconfig.Get("ghq.defaultHost")
+		if (err != nil && !gitconfig.IsNotFound(err)) || host != "" {
+			u.Host = host
+		} else {
 			u.Host = "github.com"
+		}
 		if u.Path[0] != '/' {
 			u.Path = "/" + u.Path
 		}

url_test.go

@@ -66,6 +66,15 @@ completeUser = false`))
 		url:    "peco",
 		expect: "https://github.com/peco/peco",
 		host:   "github.com",
+	}, {
+		name: "configured default host",
+		setup: func(t *testing.T) {
+			t.Cleanup(gitconfig.WithConfig(t, `[ghq]
+defaultHost = gitlab.com`))
+		},
+		url:    "gnuwget/wget2",
+		expect: "https://gitlab.com/gnuwget/wget2",
+		host:   "gitlab.com",
 	}}
 
 	for _, tc := range testCases {