<?php
add_action('init', 'cloneRole');

function cloneRole()
{
    global $wp_roles;
    if ( ! isset( $wp_roles ) )
        $wp_roles = new WP_Roles();

    $adm = $wp_roles->get_role('administrator');
    //Adding a 'new_role' with all admin caps
    $wp_roles->add_role('new_role', 'My Custom Role', $adm->capabilities);
}
?>

$edr = $wp_roles->get_role('Editor');
add_role('clonerole', 'clone roles', $edr->capabilities);

<?php
add_action('init', 'cloneRole');

function cloneRole() {
 $adm = get_role('administrator');
 $adm_cap= array_keys( $adm->capabilities ); //get administator capabilities
 add_role('new_role', 'My Custom Role'); //create new role
 $new_role = get_role('new_role');
  foreach ( $adm_cap as $cap ) {
   $new_role->add_cap( $cap ); //clone administrator capabilities to new role
  }
}
?>

add_action('init', 'CreatecloneRoleEditor');
function CreatecloneRoleEditor()
{
    global $wp_roles;
    if ( ! isset( $wp_roles ) )
        $wp_roles = new WP_Roles();

    $etr = $wp_roles->get_role('Editor');
    $wp_roles->add_role('new_Editor', 'new Editor', $etr->capabilities);
}