git pull

Another git process seems to be running in this repository, e.g.
an editor opened by 'git commit'. Please make sure all processes
are terminated then try again. If it still fails, a git process
may have crashed in this repository earlier:
remove the file manually to continue.

Updating 49b89725..a9236ab9

解决方案：

删除git目录下的.git/index.lock文件