In the early stage of development, developers copied internal code snippets to enhance developing efficiency. With the rapid growth of Bytedance, similar or equivalent code snippets across different repositories or different product lines’ codebases would potentially increase the cost of maintenance and distribute vulnerable code snippets. With the application of Clone-Detection, there are multi- ple well-established tools or techniques used for detecting similar code snippets in Java, JavaScript, Objective C and etc. We could hardly find similar tools available for Go, a widely-used program- ming language in the field of server development, especially at Bytedance. For the lack of public and labeled datasets, we utilized a great number of code snippets in Bytedance’s codebase and trained an unsupervised model to propose GoCopyCatch (GoCC), a tool and technique for Clone-Detection in Go.