Currently the turnarounds are far to heavy, it takes far too much time to redeploy java applications to OpenShift.
We just discovered today that rhc app config and rhc app deploy allow you to avoid builds upon git push and manually triggering (hot-deploys) deploy

There's a blog post that is discussing parts of this: https://www.openshift.com/blogs/introduction-to-deployments-and-rollbacks-on-openshift