});
            builder.setParentIds(Lists.newArrayList(parents));
            builder.setTreeId(commit.getTreeId());
            long timestamp = platform.currentTimeMillis();
            builder.setCommitterTimestamp(timestamp);
            builder.setCommitterTimeZoneOffset(platform.timeZoneOffset(timestamp));
            RevCommit newCommit = builder.build();
            replacedCommits.put(commit.getId(), newCommit.getId());
            objectDatabase().put(newCommit);
            head = newCommit.getId();