By rolling back your commit record, you find the following things - Repo use command is not skilled, modify too much Recommended reference to the official [documentation](https://source.android.com/setup/develop/repo) - Some common bugs in google respo, it is recommended to look at the discussion group below him. Here is the Google repo on the bug [details page](https://android.googlesource.com/tools/repo) - Finally, this is a summary of [the use of Google repo](https://www.cnblogs.com/v2m_/p/7060832.html).