`git merge-base --fork-point` using JGit (not optimal)

MergeBaseForkPoint.java

    public static Optional<RevCommit> findForkPoint(Repository repository, String base, String tip) throws IOException {
        try (RevWalk walk = new RevWalk(repository)) {
            RevCommit tipCommit = walk.lookupCommit(repository.resolve(tip));
            List<ReflogEntry> reflog = repository.getReflogReader(base).getReverseEntries();
            if (reflog.isEmpty()) {
                return Optional.empty();
            }
            // The `<=` is deliberate because we want to check both new and old IDs for the oldest entry
            for (int i = 0; i <= reflog.size(); i++) {
                ObjectId id = i < reflog.size() ? reflog.get(i).getNewId() : reflog.get(i - 1).getOldId();
                RevCommit commit = walk.lookupCommit(id);
                if (walk.isMergedInto(commit, tipCommit)) {
                    walk.parseBody(commit);
                    return Optional.of(commit);
                }
            }
        }
        return Optional.empty();
    }