Mac升级导致git报错：Can't start Git: /usr/bin/git Probably the path to Git executable is not valid

Mac从OS X 10.11升级到OS X 10.12后，使用git时报错：

Can't start Git: /usr/bin/git Probably the path to Git executable is not valid.

使用xcode-select执行安装后就可以了：

xcode-select --install