我使用此过滤器解决了以下问题：

add_filter( \'get_custom_logo\',  \'custom_logo_url\' );
function custom_logo_url ( $html ) {

$custom_logo_id = get_theme_mod( \'custom_logo\' );
$url = network_site_url();
$html = sprintf( \'<a href="%1$s" class="custom-logo-link" rel="home" itemprop="url">%2$s</a>\',
        esc_url( $url  ),
        wp_get_attachment_image( $custom_logo_id, \'full\', false, array(
            \'class\'    => \'custom-logo\',
        ) )
    );
return $html;    
}

以下是另一种解决方案：

function update_logo_url( $html ) {
    $site_url = get_site_url();

    return str_replace( $site_url, esc_url( \'https://your.url\' ), $html );
}

add_filter( \'get_custom_logo\', \'update_logo_url\' );