Error with State Machine when install/update Drupal Commerce

When I tried to install Drupal Commerce using Composer, I got an error about State Machine. Below is the error I got when trying to update it. (Same error for installing / updating)

$ composer update drupal/commerce --with-dependencies
> DrupalProject\composer\ScriptHandler::checkComposerVersion
Loading composer repositories with package information
Updating dependencies (including require-dev)                          
  - Installing drupal/state_machine (dev-1.x 7680ceb)
    Cloning 7680ceb64915f4819037d42b11dd380fa4ea50da

                                                                               
  [RuntimeException]                                                           
  Failed to clone https://git.drupal.org/project/state_machine, git was not f  
  ound, check that it is installed and in your PATH env.                       
  sh: git: command not found  

What should I do to fix this problem?

Regards,