FIX Reset failing if the branch is changed from initial, cloned one
FIX Reset failing if the branch is changed from initial, cloned one

If the BRANCH is changed after the initial clone, reset fails with "fatal:
 ambiguous argument 'origin/whatever': unknown revision or path not in the
 working tree.". This uses FETCH_HEAD ref so the branch name is irrelevant
 for reset.

Meabed/simple-php-git-deploy,kenichiii/simple-php-git-deploy,micjamking/simple-php-git-deploy,nguyenvanduocit/PHP-Git-Auto-Pull,sercba/simple-php-git-deploy,harrymt/simple-php-git-deploy,bmsrox/simple-php-git-deploy,markomarkovic/simple-php-git-deploy,karmazzin/simple-php-git-deploy