Reload document from database in Mongoose inside the instatiated object

I have a problem in my Nodejs project with Mongoose as the ORM. I am logging some requests between the client and the server. When I receive a response from a client, I issue another request, and from time to time I get a VersionError: No matching document found in Mongoose.

This is caused by the versioning system in Mongoose, as explained here: Versioning in Mongoose.

So, I'd really like to follow his advice and do something like this:

ExampleSchema.methods.update_doc = function(callback) {
    this.save(function(err, video) { 
        if(err) { 
            if(err instanceof mongoose.Error.VersionError) {
                reload mongoose document and repeat save process
            }
            callback.call(self, err);
        } else {
            callback.call(self, null);
        }
    });
}

But how can I reload the document inside the object method?