Drupal 8, allow run hook update after module install and example how run batch update in drupal 8.

group_revision.install

<?php

use Drupal\Core\Database\Database;
use Drupal\group_revision\GroupRevisionTrait;

/**
 * Implements hook_install().
 */
function group_revision_install() {
  // Update entity fields.
  \Drupal::service('entity.definition_update_manager')->applyUpdates();

  // Allow run update after module install.
  drupal_set_installed_schema_version('group_revision', 8000);
}
/**
 * Create revision for all flats and added revision to entity expense_item.
 */
function group_revision_update_8001(&$sandbox) {
  if (!isset($sandbox['progress'])) {
    $flats_ids = \Drupal::entityQuery('group')->condition('type', 'butas')->execute();

    $sandbox['group_manager'] = \Drupal::entityTypeManager()->getStorage('group');
    $sandbox['ids'] = $flats_ids;
    $sandbox['max'] = count($flats_ids);
    $sandbox['progress'] = 0;
  }

  $current_flats_ids = array_slice($sandbox['ids'], $sandbox['progress'], 25);
  foreach ($sandbox['group_manager']->loadMultiple($current_flats_ids) as $flat) {
    $revision = GroupRevisionTrait::createGroupRevision($flat);
    GroupRevisionTrait::setRevisionToGroup($flat, $revision);

    // Set flat revision to expense items.
    Database::getConnection('default')
      ->update('expense_item')
      ->fields(['flat_revision' => $revision->id()])
      ->condition('flat_id', $flat->id())
      ->execute();

    $sandbox['progress']++;
  }

  $sandbox['#finished'] = empty($sandbox['max']) ? 1 : ($sandbox['progress'] / $sandbox['max']);

  return t('Created revision for @progress flats out of @max.', ['@progress' => $sandbox['progress'], '@max' => $sandbox['max']]);
}