How use wp_insert_post and add og:custom tags?

You can add it this way, you send the tags separated by commas.

 // text add
 $my_post = array();
 $my_post['post_title'] = 'title';
 $my_post['post_content'] = 'text.';
 $my_post['post_status'] = 'publish';
 $my_post['post_author'] = 1;
 $my_post['post_category'] = array(8,39);

  //database add
  wp_insert_post( $my_post );