rsync to windows guest without modifying permissions?

[Ken Sykora]

I'm running into an issue with Vagrant rsync where anytime it transfers files to the Guest OS, it modifies permissions on them. I don't want this behavior, I'd like it to leave permissions alone. However, the arguments to update permissions seem to be hard-baked into Vagrant.

Is this intended behavior to update permissions by default? Is it possible to disable this behavior?