* Added git helper to get commit hash only

cmake/git_helper.cmake

@@ -100,3 +100,21 @@ Function ( GitGetVersion GIT_ROOT OUT_MAJOR OUT_MINOR OUT_PATCH OUT_BUILD OUT_HA
     EndIf ( )
 
 EndFunction ( )
+
+# Get the git hash og the current commit
+Function ( GitGetHash GIT_ROOT OUT_HASH )
+
+    If ( NOT EXISTS "${GIT_ROOT}/.git" )
+        Return ( )
+    EndIf ( )
+
+    GitExecute ( "git -C ${CMAKE_CURRENT_SOURCE_DIR} rev-parse HEAD" True HASH SUCCESS )
+    If ( NOT ${SUCCESS} )
+        Return ( )
+    EndIf ( )
+
+    # hash
+    String ( STRIP "${HASH}" HASH )
+    Set ( ${OUT_HASH} ${HASH} PARENT_SCOPE )
+
+EndFunction ( )