Code review is an important mechanism in modern software distributed development. In the code review scenario, providing the context information of the current changes can help code reviewers understand the evolution process of a certain source code quickly, thus enhance the efficiency and quality of code review. The existing work has provided some commit history tracking methods and corresponding tools. However, they lack the mechanism to further extracting the code evolution information for code review. To address it, we propose a novel code change tracking approach based on commit history for fine-grained code changes named C2Tracker. Given fine-grained code changes, C2Tracker could automatically extract the history commits which are related to the code changes. Furthermore, C2Tracker could mine the frequent co-occurrence changed code elements based on the FPGrowth algorithm, and mine the most related code changes using the tree-based code change representation. Finally, C2Tracker would feedback the information to the code reviewer, thereby improving the code review and decision efficiency. We conducted experiments on 10 well-known open-source projects. The results indicate that C2Tracker can achieve the accuracy of 97% on commits extraction, the accuracy of 95% on frequent co-occurrence code elements mining, and the accuracy of 97% on mining related code changes; Through human study, it has been proven that frequent co-occurrence code element information and related code change information has a significant assistive role in improving the efficiency and quality of enhanced code review in most cases.