Question about olive tree branches in new Hugelbeets

We live just outside Rome Italy and have several dozen olive trees. I'd like to build some Hugelbeets but don't want to use external inputs. Everybody here burns their olive tree prunings and on our property alone their are quite a few. I don't have any logs or stumps on hand which I can use but do have plenty of olive tree prunings, chicken, chicken, pigeon,goat and shetland pony poop as well as a fair amount of straw and compost. Does anyone know if olive tree branches are okay ph-wise and if using branches without stumps, logs, or bushes. I'm imagining my hugelbeets will have a short lifespan and sink pretty quickly. I'd really appreciate any insight. Thanks so much.

You shouldn't have any pH troubles. I built beds with and without stumps, and I can't tell much difference in the way they settle. When they do settle, you just keep building them back up with all those other inputs you have.