git: fix --tags

git.go

@@ -532,9 +532,11 @@ aside from those, there is also:
 					log("- setting HEAD to branch %s\n", color.CyanString(remoteBranch))
 				}
 
+				if c.Bool("tags") {
 					// add all refs/tags
 					output, err := exec.Command("git", "show-ref", "--tags").Output()
-				if err != nil {
+					if err != nil && err.Error() != "exit status 1" {
+						// exit status 1 is returned when there are no tags, which should be ok for us
 						return fmt.Errorf("failed to get local tags: %s", err)
 					} else {
 						lines := strings.Split(strings.TrimSpace(string(output)), "\n")
@@ -562,6 +564,7 @@ aside from those, there is also:
 							log("- setting tag %s to commit %s\n", color.CyanString(tagName), color.CyanString(commitHash))
 						}
 					}
+				}
 
 				// create and sign the new state event
 				newStateEvent := state.ToEvent()