When trying to enable an OpenShift application for a project that is in different Git repository this scenario did not worked for me:

1. WorkspaceA: Create Dynamic Web Project
2. WorkspaceA: Team -> Share Project -> Create a new repository
3. WorkspaceA: Create a new repository in a local folder
4. WorkspaceA: Push all changes
5. WorkspaceB: File -> Import -> Projects from Git -> Uri -> Local file
6. WorkspaceB: Select local repository created in step 3 and import the project into the workspace
7. WorkspaceB: Create a new OpenShift application and enable it with the imported project
8. Publish the server of push changes to openshift

Console output:
Stopping application...
Done
Emptying tmp dir: /var/lib/libra/fd01187ca404461081e35495ea2ead41/new/jbossas-7.0/standalone/tmp/vfs
Emptying tmp dir: /var/lib/libra/fd01187ca404461081e35495ea2ead41/new/jbossas-7.0/standalone/tmp/work
Starting application...
Done

I suppose that the maven pom file has not been executed and it's because the repository layout is not as expected:

Expected: repository/pom.xml
Reality: repository/project/pom.xml