Fetch tags explicitly for owners plugin

Change-Id: Ia4d8be8b196eb6a63ea30f31f59f0f849ece9e21
diff --git a/jenkins/gerrit-bazel-build-owners-plugin-branch.sh b/jenkins/gerrit-bazel-build-owners-plugin-branch.sh
index 4fa705f..d2a0230 100644
--- a/jenkins/gerrit-bazel-build-owners-plugin-branch.sh
+++ b/jenkins/gerrit-bazel-build-owners-plugin-branch.sh
@@ -2,6 +2,7 @@
 
 git checkout -f gerrit/{gerrit-branch}
 git read-tree -u --prefix=plugins/{name}-plugin origin/{branch}
+git fetch --tags origin
 ln -s plugins/{name}-plugin/owners-common .
 pushd plugins && ln -s owners-plugin/{{owners,owners-autoassign}} . && popd
 
diff --git a/jenkins/gerrit-bazel-build-owners-plugin.sh b/jenkins/gerrit-bazel-build-owners-plugin.sh
index bcc0215..dfb4694 100644
--- a/jenkins/gerrit-bazel-build-owners-plugin.sh
+++ b/jenkins/gerrit-bazel-build-owners-plugin.sh
@@ -2,6 +2,7 @@
 
 git checkout -f gerrit/{branch}
 git read-tree -u --prefix=plugins/{name}-plugin origin/{branch}
+git fetch --tags origin
 ln -s plugins/{name}-plugin/owners-common .
 pushd plugins && ln -s owners-plugin/{{owners,owners-autoassign}} . && popd