}
try {
ObjectReader reader = repo.newObjectReader();
CanonicalTreeParser oldTreeIter = new CanonicalTreeParser();
oldTreeIter.reset( reader, oldRef );
CanonicalTreeParser newTreeIter = new CanonicalTreeParser();
newTreeIter.reset( reader, newRef );
return new CustomDiffCommand( repo ).setNewTree( newTreeIter ).setOldTree( oldTreeIter ).setShowNameAndStatusOnly( true ).call();
} catch ( final Exception ex ) {
throw new RuntimeException( ex );