SAP Commerce : Connecting Internal Bitbucket repository to SAP Commerce

Hi Team,

We have a internal Bitbucket repository that can be accessed only VIA VPN. we purchased SAP Commerce cloud recently and would like to connect our internal repository to Commerce cloud. Can any one provide us the direction on how we can connect internal Bitbucket (which is not Public) to the Cloud repository. can any one please provide the documentation or any other link that points us in the right direction.

Thanks,