The problem isn't with the algorithm encoding it. The problem is with other software mangling it. Base 64 has punctuation, it's case sensitive, and trimming a

The problem isn't with the algorithm encoding it. The problem is with other software mangling it. Base 64 has punctuation, it's case sensitive, and trimming a = off the end will (counterintuitively) result in a longer payload. All of this makes screwing around with commit hashes more complicated.