I've done that before. What I did with mine was to place it horizontally in some new rooting mix within a plastic clam shell container. By planting horizontally, you can save the roots that have already formed. Two buds on that twig eventually sprouted for me producing a double headed fig tree which I later separated into two trees.

I recommend if you are going to flip it, to do it now. You might lose a couple roots in the process, but it's still early in the process and more will form. If you don't do it right away then you need to wait until the roots have hardened sufficiently that they won't break, maybe a month. After a month buds will probably have started to grow and will need to make a u turn. This is possible but not a 100% successful endeavor.

I like the horizontal option. Gives all the nodes the option of roots or shoots or both. Just put it under about an inch or half inch of potting soil, or whatever you are using for your planting mix. I couple months ago I had a cutting in sphagnum that was shooting and rooting on 3 nodes, so I put it horizontal. At first I doubted my decision, but now it has roots all over the place, the top node has a nice health shoot with a few leaves, and the middle shoot appears to be leafing out too.

Thanks, This is just what I have done- now just wait!