Updating committed file on git to have chmod 700 permissions

I have a committed file on git that currently has permissions 755, but I need it to only have 700. I was wondering if anybody has had experience with this? I was hoping a git bash command existed to simply let me say the exact permissions, but it doesn't seem as so.

What is a bit bothersome as well is I have this file as 700 on my local directory, but it has become 755 when it went onto our Azure DevOps git repo.

Git only stores two types of permissions for plain files: 644 and 755. That is, it cares only about the executable bit. There is no way to force a specific set of permissions other than those two types.

If you want the file to have different permissions in the working tree, you can set core.sharedRepository to 0600, which will make files have either 0600 or 0700 permissions, or you can fix it up after the fact with a post-checkout hook or a script. However, none of these are automatic, since Git does not allow pushing configuration or hooks to users, so each user will have to set this appropriately.