An easy option for OpenShift deployment especially useful for demos is using a quickstart cartridge, which allows to get started with OpenMRS in literally few minutes.
git clone ssh://$OPENSHIFT_APP_UUID@$OPENSHIFT_APP_DNS/~/git/openmrs.git/
Move to the resulting directory:
git remote add upstream -m master firstname.lastname@example.org:ixWDE4eR/openshift-openmrs-quickstart.git
git pull -s recursive -X theirs upstream master