git merge script for many branches. Run sh merge.sh branch1 branch2 ...

merge.sh

branch=$(git symbolic-ref --short -q HEAD)
git pull origin $branch
git push origin $branch
for environment in "$@"
do
	echo "Merging environment $environment"
	git checkout $environment
	git pull origin $environment
	git merge $branch
	git push origin $environment
	git checkout $branch
done