SSH into Open-Shift instances:

https://www.openshift.com/blogs/access-your-application-gear-using-ssh-with-putty

How to deploy WAR files inside Open-Shift:

http://whyjava.wordpress.com/2012/11/25/deploy-war-on-tomcat-running-on-openshift/

How to restart Open-Shift without Git pushes: 

ctl_app  : control your application (start, stop, restart, etc)