tests: Check refspec switch updates git branch/commit correctly

Mercurial has no concept of a local tracking branch so we only need to
test git repositories here.

Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

tests/test_refspec/oe-init-build-env

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+true

tests/test_refspec/test.yml

@@ -0,0 +1,13 @@
+header:
+  version: 8
+
+repos:
+  this:
+
+  kas:
+    url: https://github.com/siemens/kas.git
+    refspec: 907816a5c4094b59a36aec12226e71c461c05b77
+
+  kas2:
+    url: https://github.com/siemens/kas.git
+    refspec: master

tests/test_refspec/test2.yml

@@ -0,0 +1,13 @@
+header:
+  version: 8
+
+repos:
+  this:
+
+  kas:
+    url: https://github.com/siemens/kas.git
+    refspec: master
+
+  kas2:
+    url: https://github.com/siemens/kas.git
+    refspec: 907816a5c4094b59a36aec12226e71c461c05b77