Last tested: Sep 3, 2019
Those with multiple projects could be using different repositories, and it's hard to troubleshoot when we don't know where the remote is hosted.
Check in Looker
Go to "Project Settings" and scroll to the bottom of the page - here you will see the Remote Origin URL:
Check in Looker server
If you have access to the Looker server, navigate to the project directory inside of the
/looker/models/project_x and run the following code:
git config --get remote.origin.url
The following info will be displayed:
lookeruser@instance:~/looker/models/project$ git config --get remote.origin.url
showing the repo.