> If it'd been something like an SQLite database instead (just an example really)

See Fossil (https://fossil-scm.org/)

P.S. There's also (https://www.sourcegear.com/vault/)

> SourceGear Vault Pro is a version control and bug tracking solution for professional development teams. Vault Standard is for those who only want version control. Vault is based on a client / server architecture using technologies such as Microsoft SQL Server and IIS Web Services for increased performance, scalability, and security.