adding a Git pull that wipes local changes like Notebook Cells

Author: justb4

refresh-git.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Refresh from original Repo
+# WARNING will remove all your local changes!!!
+# except for files not in Git
+#
+# Handy if your Jupyter Notebooks have executed Cells you don't want
+# to commit. 
+#
+# Author: Just van den Broecke
+#
+git fetch --all
+git reset --hard origin/master