Git Pull Bash function

pull.sh

# gp remembers the last commit before pulling, pulls the repository and logs
# all the commits oldest to newest along with their changes.
gp () {
  # The last variable therefore stores the most recent commit's hash.
  #
  # What's Going on:
  #   git log --oneline prints a commit log on one line:
  #     b9bda7f Allocation free Integer#to_s
  #   git log -n 1 outputs only one commit, defaulting to the most recent commit.
  #   The log result is piped to awk which grabs the first leftmost column which
  #   is the commit hash.
  last=$(git log --oneline -n 1 | awk '{print $1;}')
  git pull
  # git log -p stands for "patch" and shows the changes made in the commit.
  # git log --reverse shows sorts by oldest commit first.
  # $last..HEAD says "show me everything since the $last commit, excluding it.
  git log -p --reverse $last..HEAD
}