In an ideal world the rclone special remote would support git-annex' importtree feature. Then you could periodically run `git annex import <branch>:<subdir> --from <sharepoint/dropbox-remote>` to "pull" from those remotes (it is not really a pull as you aren't fetching version-controlled data from those remotes, rather you are importing from a non-version-controlled source and record the result as a new revision).

Unfortunately this is not (yet?) supported I think. But you could also just do something like this: `rclone copy/sync <sharepoint/dropbox-remote>: ./<local-directory> && git annex add ./<local-directory> && git commit -m <message>`.