Fix to Horizon git source engine

Change-Id: I7121382b9082a892c2a851dba78f4739b7a256f9
diff --git a/horizon/server/multi/init.sls b/horizon/server/multi/init.sls
index 63fa6f4..dcf8b74 100644
--- a/horizon/server/multi/init.sls
+++ b/horizon/server/multi/init.sls
@@ -2,6 +2,6 @@
 {%- if server.enabled %}
 
 include:
-- horizon.server.multi.service_git
+- horizon.server.multi.service
 
 {%- endif %}
diff --git a/horizon/server/multi/service_git.sls b/horizon/server/multi/service.sls
similarity index 100%
rename from horizon/server/multi/service_git.sls
rename to horizon/server/multi/service.sls
diff --git a/horizon/server/multi/site.sls b/horizon/server/multi/site.sls
index ed503a1..4dc8595 100644
--- a/horizon/server/multi/site.sls
+++ b/horizon/server/multi/site.sls
@@ -55,11 +55,11 @@
   - name: {{ app.source.address }}
   - target: /srv/horizon/sites/{{ app_name }}/extra
   {%- if grains.saltversioninfo.0 > 2015 %}
+  - rev: HEAD
   - branch: {{ app.source.revision }}
   {%- else %}
   - rev: {{ app.source.revision }}
   {%- endif %}
-  - depth: 1
   - submodules: True
   - require:
     - virtualenv: /srv/horizon/sites/{{ app_name }}
@@ -259,7 +259,12 @@
   {{ plugin.source.engine }}.latest:
   - name: {{ plugin.source.address }}
   - target: /srv/horizon/sites/{{ app_name }}/plugins/{{ plugin_name }}
+  {%- if grains.saltversioninfo.0 > 2015 %}
+  - rev: HEAD
+  - branch: {{ plugin.source.revision }}
+  {%- else %}
   - rev: {{ plugin.source.revision }}
+  {%- endif %}
   - submodules: True
   - require:
     - file: /srv/horizon/sites/{{ app_name }}/plugins