Add unstagebranch script

script/unstagebranch

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+#
+# Unstage a branch
+
+set -e
+
+branch=$(git rev-parse --abbrev-ref HEAD)
+
+if [ -z "$1" ]; then
+  basebranch="master"
+else
+  basebranch="$1"
+fi
+
+diff=$(git diff $basebranch...HEAD)
+git co -q "$basebranch"
+echo "$diff" | git apply
+echo "Unstaged $branch against $basebranch successfully"
+git diff --shortstat "HEAD...$branch"