Hello @VT ,
Thanks for the question and using MS Q&A platform.
You have two ask here , for pulling in the all the files in a particular brach , you can use the "fetch" feature in Azure devops . Read more about the same here .
For the second ask, i am not sure if I understand the ask here as "ipynb" are the extension for Jupiter notebook. If the ask is to pull all the notebooks from a branch , the first suggestion should help .
Thanks
Himanshu
Please accept as "Yes" if the answer provided is useful , so that you can help others in the community looking for remediation for similar issues.