The optimal method for integrating Databricks Repos with CI/CD pipelines using Git involves configuring webhooks in Git to trigger Databricks notebook runs upon commits to specific branches. This approach ensures:

1. Rigorous Version Control: Automatically tracks and versions notebook changes, facilitating easy rollback to previous versions if necessary.
2. Automated Deployments: Eliminates manual intervention by deploying notebook changes to the Databricks environment automatically, reducing human error and ensuring environment consistency.
3. CI/CD Pipeline Integration: Seamlessly connects Databricks Repos with CI/CD pipelines, enabling continuous integration and deployment for up-to-date code availability in testing and production.
4. Efficiency: Offers a more efficient solution than manual syncing, ensuring immediate reflection of changes in the Databricks environment and minimizing conflict risks.

In summary, setting up Git webhooks to trigger Databricks notebook runs on commit is the most effective strategy for integrating Databricks Repos with CI/CD pipelines, ensuring version control, deployment automation, pipeline integration, and operational efficiency.