Added naive clone or pull.

Signed-off-by: Tony Tkacik <tonydamage@gmail.com>

bin/clone-or-pull

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+# FIXME: Add checks
+REPO="$PWD";
+TARGET_DIR="$1";
+BRANCH="$2";
+
+function perform_clone_or_pull {
+  target="$1";
+  if [! -e "$target/.git" ]; then
+    git clone "$REPO" "$target";
+  fi
+  (
+    cd "$target";
+    git fetch
+    git checkout origin/$BRANCH
+  )
+}
+
+while read old_rew new_rew ref; do
+  if [ "$ref" == "refs/heads/$BRANCH"]; then
+    perform_clone_or_pull "$TARGET_DIR";
+  fi;
+done;