Another git process seems to be running in this repository, e.g. An editor is opened by ‘git commit’. Please make sure all processes are terminated then try again. a git process may have crashed in this repository earlier: remove the file manually to continue.

Another Git process appears to be running in this repository, such as the editor opened by ‘git commit’. Make sure all processes are terminated and try again. If it still fails, then a Git process may have crashed earlier in the repository: manually delete the file to continue.
If you have an editor with the “git commit” command on, close all git related processes and try again. If not, delete the file manually.
Windows for the process of synchronous mutually exclusive management, there is a resource lock mechanism. There must be a process to lock a resource, but because the process suddenly crashed, not in time to unlock, resulting in other processes can not access
We delete a mutex file on the line, into the workspace directory under the hidden file. Git, where the index.lock file deleted, the problem solved.