Currently working with salesforce, where code is stored in the database ... to put it simply it's not a really good idea because they never decide to go full db or full files. SO you have to manage files in git and deploy to database. So multiple source of truth : sf db, disk, you git, git of other dev, and central repo. Welcome in 1990 when you work as a team. ie ask your collegue if they already work on component if you need to change it ...