> So now when using plain git the choices are to have every action tracked, or to go through a very annoying process involving randomly generated keys.

EDIT: this alias has a bug that means it doesn't work as intended, see below, don't use it

If you're that worried, I threw this shitty Bash function together in five minutes just now; stick this in your bashrc and then `anongit ...` instead of `git`:

  anongit () {
    mkdir -p ~/.random-ssh-keys
    KEYNAME=$(openssl rand -hex 12)
    KEYFILE=~/.random-ssh-keys/$KEYNAME
    ssh-keygen -q -C $KEYNAME -N "" -f $KEYFILE
    GIT_SSH_COMMAND="ssh -i $KEYFILE" git "$@"
  }

Problem solved!

...or you could clone over HTTPS instead :)