diff --git a/installer/image_build/files/Dockerfile.sdist b/installer/image_build/files/Dockerfile.sdist
index 15d0749f15..cf9845e540 100644
--- a/installer/image_build/files/Dockerfile.sdist
+++ b/installer/image_build/files/Dockerfile.sdist
@@ -1,11 +1,12 @@
 FROM centos:7
 
 RUN yum install -y epel-release
+RUN yum install -y https://centos7.iuscommunity.org/ius-release.rpm
 
 RUN yum install -y bzip2 \
     gcc-c++ \
     gettext \
-    git \
+    git2u-core \
     make \
     python \
     python-pip
diff --git a/installer/image_build/tasks/main.yml b/installer/image_build/tasks/main.yml
index 3b7724a475..d3dd66207f 100644
--- a/installer/image_build/tasks/main.yml
+++ b/installer/image_build/tasks/main.yml
@@ -1,6 +1,6 @@
 ---
 - name: Get Version from checkout if not provided
-  shell: "git describe --long | sed 's/\\-g.*//' | sed 's/\\-/\\./'"
+  shell: "git describe --long --first-parent | sed 's/\\-g.*//' | sed 's/\\-/\\./'"
   delegate_to: localhost
   register: awx_version_command
   when: awx_version is not defined