1. Go to the Acquia account click on box(there you want to point the branch changes) and follow the image instructions:
2. Go to the project folder or docroot and open cmd terminal and run the command.
drush sa // for print all project aliases or environments/boxes of acquia
Then
Take the alias of box where you want to point the config changes..
drush @alias cim //for point config changes
drush @alias cim //for point config changes
3 If you want to create the reset password for new or already exist box link:
drush @alias uli //for reset password link
Note: If have any suggestions or issue regarding 'How to point the branch changes to Acquia by Git?' then you can ask by comments.