<?php

      namespace ArnavcancleorderCancleorderCron;

      use MagentoSalesModelOrder;

     class CancelPendingOrders

      {

protected $logger;

/**
 * Constructor
 *
 * @param PsrLogLoggerInterface $logger
 */

public function __construct(PsrLogLoggerInterface $logger)
{
    $this->logger = $logger;
}

/**
 * Execute the cron
 *
 * @return void
 */

public function execute()

{

        $objectManager = MagentoFrameworkAppObjectManager::getInstance();
        $orders = $objectManager->create('MagentoSalesModelOrder')
                        ->getCollection()
                        ->addFieldToFilter('status', 'pending_payment');
                        ->addFieldToFilter('updated_at', array('lt' =>  new Zend_Db_Expr("DATE_ADD('".now()."', INTERVAL -'10' HOUR)"))) ;



              foreach ($orders as $order) {

              $order->cancel()->save();

               }
            }

}