Fetch benchmark before checkout

benchmark/benchmark.go

@@ -48,7 +48,10 @@ func main() {
 		log.Fatal(err)
 	}
 
-	log.Printf("Done; Checking out benchmark branch")
+	log.Printf("Benchmarking done; Fetching benchmark branch")
+	fetchBenchmark()
+	time.Sleep(200 * time.Millisecond)
+	log.Printf("Checking out benchmark branch")
 	checkoutBenchmark()
 	time.Sleep(200 * time.Millisecond)
 	log.Printf("Adding benchmark results")
@@ -72,8 +75,17 @@ func getHeadHash() string {
 	return strings.TrimSpace(string(out))
 }
 
+func fetchBenchmark() {
+	gitFetch := exec.Command("git", "fetch", "origin", "benchmark")
+	gitFetch.Dir = "../"
+	out, err := gitFetch.CombinedOutput()
+	if err != nil {
+		log.Fatalf("Could not fetch benchmark branch with code %v and error %v", err, string(out))
+	}
+}
+
 func checkoutBenchmark() {
-	gitCheckout := exec.Command("git", "checkout", "benchmark")
+	gitCheckout := exec.Command("git", "checkout", "origin/benchmark")
 	gitCheckout.Dir = "../"
 	out, err := gitCheckout.CombinedOutput()
 	if err != nil {