wp_switch_roles_and_user( int $new_site_id, int $old_site_id )

Source

File: wp-includes/ms-blogs.php

function wp_switch_roles_and_user( $new_site_id, $old_site_id ) {
	if ( $new_site_id == $old_site_id ) {
		return;
	}

	if ( ! did_action( 'init' ) ) {
		return;
	}

	wp_roles()->for_site( $new_site_id );
	wp_get_current_user()->for_site( $new_site_id );
}