cd /usr/local/bin
php -r "readfile('https://getcomposer.org/installer');" | php
sudo mv composer.phar composer
cd /var/www/
git clone [get the link from bitbucket] # this will clone the repo inside www folder
sudo chmod 777 -R /var/www/mw/app/storage
cd /var/www/mw
git checkout dev
composer update