diff --git a/buildVersion.sh b/buildVersion.sh
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index 0000000..38d3b0f
--- /dev/null
+++ b/buildVersion.sh
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+# This script is sourced from each of the manualBuild.sh scripts.
+# The git branch indicates the GTE version and is appended to the docker image tag
+# e.g. tier/gte:101.1.1-201906 where 201906 is the git branch
+export VERSION_TAG=`git status --porcelain=2 -b | grep branch.head | cut -d ' ' -f 3`
+