curiosity won out -
I tried a few ideas and this worked best, and actually would be handy - if you hand baste . . .
No idea if this is "correct" or not.
take a stitch and then move the fabric back while moving the needle (out of the fabric) so the thread will also slip back under the guide.
I stopped to take the picture, but I pulled the needle all the way through before moving the fabric back.
this has the fabric moved back for the next stitch, with the needle moved so the thread also slipped under the guide and is now ready for the next stitch forward.
not the best - but you get the idea . . .