diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 4c91a49de..8c93ef82a 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -523,20 +523,18 @@ class Player extends Human implements CommandSender, InventoryHolder, ChunkLoade
 	}
 
 	public function sendCommandData(){
-		$pk = new AvailableCommandsPacket();
 		$data = new \stdClass();
 		$count = 0;
 		foreach($this->server->getCommandMap()->getCommands() as $command){
-			//TODO: fix command permission checks on join
-			/*if(!$command->testPermissionSilent($this)){
-				continue;
-			}*/
-			++$count;
-			$data->{$command->getName()}->versions[0] = $command->generateCustomCommandData($this);
+			if(($cmdData = $command->generateCustomCommandData($this)) !== null){
+				++$count;
+				$data->{$command->getName()}->versions[0] = $cmdData;
+			}
 		}
 
 		if($count > 0){
 			//TODO: structure checking
+			$pk = new AvailableCommandsPacket();
 			$pk->commands = json_encode($data);
 			$this->dataPacket($pk);
 		}
diff --git a/src/pocketmine/PocketMine.php b/src/pocketmine/PocketMine.php
index d8b1fdd3c..26c765e21 100644
--- a/src/pocketmine/PocketMine.php
+++ b/src/pocketmine/PocketMine.php
@@ -470,9 +470,18 @@ namespace pocketmine {
 		exit(1); //Exit with error
 	}
 
-	if(file_exists(\pocketmine\PATH . ".git/refs/heads/master")){ //Found Git information!
-		define('pocketmine\GIT_COMMIT', strtolower(trim(file_get_contents(\pocketmine\PATH . ".git/refs/heads/master"))));
-	}else{ //Unknown :(
+	if(file_exists(\pocketmine\PATH . ".git/HEAD")){ //Found Git information!
+		$ref = trim(file_get_contents(\pocketmine\PATH . ".git/HEAD"));
+		if(preg_match('/^[0-9a-f]{40}$/i', $ref)){
+			define('pocketmine\GIT_COMMIT', strtolower($ref));
+		}elseif(substr($ref, 0, 5) === "ref: "){
+			$refFile = \pocketmine\PATH . ".git/" . substr($ref, 5);
+			if(is_file($refFile)){
+				define('pocketmine\GIT_COMMIT', strtolower(trim(file_get_contents($refFile))));
+			}
+		}
+	}
+	if(!defined('pocketmine\GIT_COMMIT')){ //Unknown :(
 		define('pocketmine\GIT_COMMIT', str_repeat("00", 20));
 	}
 
diff --git a/src/pocketmine/command/Command.php b/src/pocketmine/command/Command.php
index 7a621a004..174a2a786 100644
--- a/src/pocketmine/command/Command.php
+++ b/src/pocketmine/command/Command.php
@@ -108,13 +108,13 @@ abstract class Command{
 	 */
 	public function generateCustomCommandData(Player $player){
 		//TODO: fix command permission filtering on join
-		/*if(!$this->testPermission($player)){
+		/*if(!$this->testPermissionSilent($player)){
 			return null;
 		}*/
 		$customData = clone $this->commandData;
 		$customData->aliases = $this->getAliases();
 		/*foreach($customData->overloads as &$overload){
-			if(($p = @$overload->pocketminePermission) !== null and !$player->hasPermission($p)){
+			if(isset($overload->pocketminePermission) and !$player->hasPermission($overload->pocketminePermission)){
 				unset($overload);
 			}
 		}*/