let the contrib/git-sync use a for-loop, rather than relying on the pod's restart policy, to periodically pull from the repo

contrib/git-sync/main.go

@@ -66,6 +66,7 @@ func main() {
 	if _, err := exec.LookPath("git"); err != nil {
 		log.Fatalf("required git executable not found: %v", err)
 	}
+	for {
 		if err := syncRepo(*flRepo, *flDest, *flBranch, *flRev); err != nil {
 			log.Fatalf("error syncing repo: %v", err)
 		}
@@ -73,6 +74,7 @@ func main() {
 		time.Sleep(time.Duration(*flWait) * time.Second)
 		log.Println("done")
 	}
+}
 
 // syncRepo syncs the branch of a given repository to the destination at the given rev.
 func syncRepo(repo, dest, branch, rev string) error {