Git fetch, merge and push in one command

git-fetch-merge.sh

#!/usr/bin/env bash

MASTER="master"

if [[ "$1" != "" ]]; then
  BRANCH="$1"
else
  BRANCH=$(git rev-parse --abbrev-ref HEAD)
fi

echo "> Fetching origin/$MASTER..."
git fetch origin $MASTER

echo "> Merging with $BRANCH"
git merge origin/master $BRANCH

echo "> Done"

read -r -p "Do you want to push this branch? [y/N] " response
case "$response" in
  [yY][eE][sS]|[yY]) 
    echo "> Pushing $BRANCH to origin..."
    git push origin $BRANCH
    exit 0
    ;;
  *)
    exit 0
    ;;
esac