Add shel script for git-helpers

git.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -x 
+commit_before_pull=""
+
+save_commit_before_pull () {
+    commit_before_pull=$(git reflog | grep "HEAD@{0}" | cut -d" " -f1)
+    if ! [ -z "$commit_before_pull" ]; then
+        if grep -qE "^[[:xdigit:]]{6,}$" <<< $commit_before_pull; then
+            return 0
+        fi
+    fi
+    commit_before_pull=""
+    return 1
+}
+# save_commit_before_pull
+
+revert_to_commit_before_pull () {
+    if ! [ -z "$commit_before_pull" ]; then
+        if grep -qE "^[[:xdigit:]]{6,}$" <<< $commit_before_pull; then
+            `git reset --hard "$commit_before_pull"`
+            if [ $? -eq 0 ]; then
+                return 0
+            fi
+        fi
+    fi
+    return 1
+}
+# revert_to_commit_before_pull