openshift does not compile anymore

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:1.1.0:compile (default-compile) on project org.jboss.tools.openshift.egit.test: Compilation failure: Compilation failure: 
[ERROR] /mnt/hudson_workspace/workspace/jbosstools-openshift-Pull-Request/tests/org.jboss.tools.openshift.egit.test/src/org/jboss/tools/openshift/egit/internal/test/util/TestRepository.java:[477] 
[ERROR] 	Ref ref = repository.getRef(Constants.HEAD);
[ERROR] 	                     ^^^^^^
[ERROR] The method getRef(String) is undefined for the type Repository
[ERROR] 1 problem (1 error)
[ERROR] -> [Help 1]