diff --git a/build/get-plugin-rev.sh b/build/get-plugin-rev.sh
index 3f6913477..f02499c7e 100755
--- a/build/get-plugin-rev.sh
+++ b/build/get-plugin-rev.sh
@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
 # Script to get number of commits from the last OPA revendoring
 
-GIT_SHA=$(git log -n 1 --pretty=format:%H -- vendor/github.com/open-policy-agent/opa)
+LINE=$(git grep -n "github.com/open-policy-agent/opa " go.mod | awk -F: '{ print $2 }')
+GIT_SHA=$(git log -n 1 --pretty=format:%H -L $LINE,$LINE:go.mod | head -1)
 COMMITS=$(git rev-list $GIT_SHA..HEAD --count)
 
 if [ $COMMITS -ne 0 ]; then