RevWalk walk = new RevWalk(repo);
   // These two lines give me trouble:
   // RevFilter filter = CommitTimeRevFilter.between(sinceDate, untilDate);
   // walk.setRevFilter(filter);

    Ref head = repo.getRef("refs/heads/master");
    RevCommit headCommit = walk.parseCommit(head.getObjectId());
    // omitting some exception handling for conciseness
    walk.markStart(headCommit);

    List<MyCommitPOCO> commits  = new LinkedList<>();

    for(RevCommit commit : walk) {
        MyCommitPOCO processedCommit = processRevCommit(commit);
        commits.add(processedCommit);
    }

    walk.dispose();

    return commits;