A script to `git stash` only the currently staged changes.

stashstaged.sh

#!/usr/bin/env bash

# This script stashes the currently staged changes, and leaves everything else in the working directory as-is.
# (source: https://stackoverflow.com/questions/14759748/stashing-only-staged-changes-in-git-is-it-possible/39644782#39644782)

# Prompt for the desired repo path
REPOPATH=
read -p "Enter the repo path, or press ENTER for current dir: " REPOPATH

# Read the desired stash description from the command line, or prompt the user for it if necessary
STASHNAME=$1
while [ "$STASHNAME" = "" ] ; do
  read -p "Enter a description for this stash: " STASHNAME
done

#git -C "$REPOPATH" log -1

# Stash everything temporarily. Keep staged files, discard everything else after stashing.
#git --git-dir $REPOPATH/.git stash --keep-index
git -C "$REPOPATH" stash --keep-index

# Stash everything that remains (only the staged files should remain). This is the stash we want to keep, so give it a name.
git -C "$REPOPATH" stash save "$STASHNAME"

# Apply the original stash to get us back to where we started
git -C "$REPOPATH" stash apply stash@{1}

# Create a temporary patch to reverse the originally staged changes and apply it
git -C "$REPOPATH" stash show -p | git -C "$REPOPATH" apply -R

# Delete the temporary stash
git -C "$REPOPATH" stash drop stash@{1}

Thanks @typebrook that works great!