One off plugin to add Git Updater dot org overrides so the hook remains active even when the specific plugin is not active.

git-updater-dot-org-overrides.php

<?php
/**
 * Git Updater Overrides for WP.org repo.
 *
 * @package GU_Overrides
 *
 * Plugin Name:       Git Updater Overrides for WP.org
 * Plugin URI:        https://gist.github.com/afragen/763e57af7ddc5a40692fdf5d977f2902
 * Description:       Override WP.org updates for plugins and themes in favor of updates from Git Updater.
 * Version:           0.2.0
 * Author:            Andy Fragen
 * License:           MIT
 * Requires at least: 6.2
 * Requires PHP:      7.4
 * Gist Plugin URI:   https://gist.github.com/afragen/763e57af7ddc5a40692fdf5d977f2902
 */

namespace Fragen\GU_Overrides;

/*
 * Add plugin or theme elements to the following array.
 *
 * Plugin format is `my-plugin/my-plugin.php`.
 * Theme format is `my-popular-theme`.
 */
$my_gu_overrides = array();

add_filter(
	'gu_override_dot_org',
	function ( $overrides ) use ( $my_gu_overrides ) {
		return array_merge( $overrides, $my_gu_overrides );
	}
);

// Activating this filter works similarly to adding every plugin/theme to the `$my_gu_overrides` array.
// add_filter( 'gu_ignore_dot_org', '__return_true' );