try {
Ref ref = repository.getRef(refName);
if (ref != null)
merge.include(ref);
else
merge.include(ObjectId.fromString(refName));
} catch (IOException e) {
throw new TeamException(CoreText.MergeOperation_InternalError, e);
}
if (fastForwardMode != null)
merge.setFastForward(fastForwardMode);