Having written my own git client, I can tell you that "the most complicated part will be the command-line arguments parsing logic" doesn't go away. I wouldn't be surprised to wake up one day and find someone published a proof that NP != P, and the proof involved trying to parse the git command line.
Doesn't seem that realistic. I reloaded a bunch of times, and didn't get a single one where the same command can mean 3 different context-sensitive things that each take different arguments but are all named the same command.
