Does trackerless bittorrent provide a way to update a file ? The git objects themselves are content-addressable (the key is the hash of the value) but you stil

Does trackerless bittorrent provide a way to update a file ? The git objects themselves are content-addressable (the key is the hash of the value) but you still need a unique ID that references the HEAD of this chain of objects. This id needs to be updateable.