WordPress blog clone.. wp-admin issue

Here’s 1 way to fix this. Add below inside Site2 wp-config.php:

define('WP_SITEURL', 'http://Site2');
define('WP_HOME', 'http://Site2'); 

Once logged in, go to Settings > General and change WordPress address (URL), Site address (URL) to Site2. Then delete those 2 lines that you add inside wp-config.php.