bash function to override git init/clone commands

git-function.sh

function git() {

  for i do
        lastArgument=$i # last argument can be the directory or the repository url
  done

  /usr/local/bin/git $@

  if [[ $? -eq 0 ]] # only show prompt if git command was successful
  then
    if [[ "$1" = "init" || "$1" = "clone" ]]
    then
      if [[ -d "$lastArgument" ]]
      then
        # it was the directory argument, cd it
        cd $lastArgument
      else
        # no directory given, parse it from repository url
        cd $(echo $lastArgument | awk -F/ '{ print $NF }' | rev | sed 's/tig.//' | rev)
      fi
      git-email-prompt.sh
    fi
  else
    # return the exit code of the failed git command call
    return $?
  fi
}

Note that you don't have to enter the repo to set the email - with new enough versions of Git, you can pass configuration options at clone-time. This means you won't have to bother with getting the directory.
See how I solve the email problem here: https://github.com/jan-warchol/dotfiles/blob/devel/bin/git-cln