stash changes > fetch all branches > pull all branches from remote > merge each local branch with master > pop stash > enjoy!

sync_git_branches.sh

#!/usr/bin/env bash
I="\e[96m"
E="\e[90m"

echo -e "🤖$I  starting sync.. $E";

CURRENT_BRANCH="`git rev-parse --abbrev-ref HEAD`"
STASH_RESULT="`git stash push -u -m AUTO_STASH | grep Saved`"

if [ -n "$STASH_RESULT" ]; then
 echo -e "🤖$I  stashed changes to AUTO_STASH $E";
fi

git fetch --all -p

LOCAL_BRANCHES=`git branch | cut -c 3-`;
BRANCHES_WITH_REMOTES=`git for-each-ref --format '%(refname:short):%(upstream:short)' 'refs/heads' | grep -v ':$'`;

echo $BRANCHES_WITH_REMOTES | while IFS=: read local remote; do
echo -e "🤖$I  running git checkout $local $E"
git checkout $local || return 1;
echo -e "🤖$I  running git pull $E"
git pull;
done

echo $LOCAL_BRANCHES | while IFS=: read local; do
echo -e "🤖$I  running git checkout $local $E"
git checkout $local || return 1;
echo -e "🤖$I  merging $local with master $E"
git merge master || return 1;
done

echo -e "🤖$I  checkingout starting branch $CURRENT_BRANCH $E"

git checkout $CURRENT_BRANCH

if [ -n "$STASH_RESULT" ]; then
  git stash pop;
else
  echo -e "🤖$I  no changes found. skipping stash pop $E";
fi

echo -e "🤖$I  All good 🎉🎉 $E";