We have a report generator. Daily, it writes its data into a excel file.
For reasons of version controlling and file data safety, we need to alter this file, and commit
You might be able to turn on Autoversioning for your repository. Since it uses WebDAV, you can treat the repository just like a network drive (Web Folder). And you can treat the file as a normal file, just open, modify, and save.
If it were me , I would create a new repository for the excel data files. I don't think I'd like my code being autoversioned :)