Change Custom Logo URL in Wordpress

functions.php

/**
 * Change the custom logo URL
 */
function my_custom_logo_link() {

	// The logo
    $custom_logo_id = get_theme_mod( 'custom_logo' );

    // If has logo
    if ( $custom_logo_id ) {

    	// Attr
	    $custom_logo_attr = array(
			'class'    => 'custom-logo',
			'itemprop' => 'logo',
		);

		// Image alt
		$image_alt = get_post_meta( $custom_logo_id, '_wp_attachment_image_alt', true );
		if ( empty( $image_alt ) ) {
			$custom_logo_attr['alt'] = get_bloginfo( 'name', 'display' );
		}

	    // Get the image
	    $html = sprintf( '<a href="%1$s" class="custom-logo-link" rel="home" itemprop="url">%2$s</a>',
			esc_url( 'CUSTOM_URL_HERE' ),
			wp_get_attachment_image( $custom_logo_id, 'full', false, $custom_logo_attr )
		);

	}

	// Return
    return $html;   
}
add_filter( 'get_custom_logo', 'my_custom_logo_link' );