Alias to update a forked repo with the original. One for zsh and one for bash

ghUpdate.bash

#!/usr/bin/env bash

  function ghUpdate() {
    read -p "Whats the URl of the original repo? | " answer
# Add the remote, call it "upstream":
    echo $answer
    git remote add upstream $answer
# Fetch all the branches of that remote into remote-tracking branches,
# such as upstream/master:

    git fetch upstream

# Make sure that you're on your master branch:

    git checkout master

# Rewrite your master branch so that any commits of yours that
# aren't already in upstream/master are replayed on top of that
# other branch:

    git rebase upstream/master
  }

ghUpdate.zsh

#!/usr/bin/env zsh

  function ghUpdate() {
    read "?Whats the URl of the original repo? | " answer
# Add the remote, call it "upstream":
    echo $answer
    git remote add upstream $answer
# Fetch all the branches of that remote into remote-tracking branches,
# such as upstream/master:

    git fetch upstream

# Make sure that you're on your master branch:

    git checkout master

# Rewrite your master branch so that any commits of yours that
# aren't already in upstream/master are replayed on top of that
# other branch:

    git rebase upstream/master
  }