Merge pull request #2127 from CortexFoundation/dev

internal/build: include git-date on detached head

internal/build/env.go

@@ -109,6 +109,7 @@ func LocalEnv() Environment {
 		commitRe, _ := regexp.Compile("^([0-9a-f]{40})$")
 		if commit := commitRe.FindString(head); commit != "" && env.Commit == "" {
 			env.Commit = commit
+			env.Date = getDate(env.Commit)
 		}
 		return env
 	}