Can nbgitpuller be configured to always override the existing workspace?

Sometimes nbgitpuller doesn’t overwrite changes to users notebooks even though changes in the upstream repo have been made. This probably makes sense if a an existing user has changes in their notebook they wish to keep and no easy fastforward merge is available, but what if as a teacher I always want the latest upstream changes to be merged, forcefully if necessary? Is there an option for nbgitpuller to always overwrite the existing workspace if a fastforward merge isn’t possible? Sorry if I’ve overlooked this in the documentation, or if I’ve misunderstood git or nbgitpuller and please forgive my ignorance. Thank you!