Ticket #16778: 16778.diff

src/wp-includes/update.php

@@ -96 +96 @@
                 'multisite_enabled' => $multisite_enabled,
         );
 
+        /**
+         * Filter the arguments sent as part of the core version check.
+         *
+         * @since 4.4.0
+         *
+         * @param array $query Version check query arguments.
+         */
+        $query = apply_filters( 'core_version_check_query_args', $query );
+
         $post_body = array(
                 'translations' => wp_json_encode( $translations ),
         );