Checkout back to the last used git branch like cd -

gco

#!/bin/sh

current_branch=`git rev-parse --abbrev-ref HEAD`
if [ -z "$current_branch" ]; then
	echo "You are not in a git repository." >&2
	exit 1
fi

branch=${1:-develop}
[ "$current_branch" = "$branch" ] && exit 0

git_dir=`git rev-parse --show-toplevel`
if [ -z "$git_dir" ]; then
	echo "You are not in a git repository." >&2
	exit 1
fi

old_gcb_cache=$git_dir/.oldgwd
[ -f "$old_gcb_cache" ] && old_gcb=`cat $old_gcb_cache`
[ "$branch" = '-' ] && branch=$old_gcb
[ -z "$branch" ] && branch=develop
if ! git rev-parse --verify $branch 2> /dev/null >&2; then
	echo "The branch $branch does not exist." >&2
	exit 1
fi

git checkout $branch
[ "$old_gcb" = "$current_branch" ] || echo "$current_branch" > $old_gcb_cache

Checkout develop branch

gco

Checkout the specified branch

gco feature/test

Checkout back to the last used branch

gco -