diff --git a/scripts/repo-watcher.sh b/scripts/repo-watcher.sh
new file mode 100755
index 0000000..f2bb3c1
--- /dev/null
+++ b/scripts/repo-watcher.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# Copyright 2016 The Fuchsia Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+# Make sure $JIRI_ROOT isn't blank because we're going to use it later to construct paths.
+if [[ -z "${JIRI_ROOT}" ]]; then
+  echo "JIRI_ROOT must be set!"
+  exit 99
+fi
+
+if [[ $# -ne 2 ]]; then
+  echo "Usage: $0 [build-name-to-kick-off] [comma-separated list of repos to watch]"
+  echo "Example: $0 ignore-fuchsia-magenta-build magenta,infra"
+  exit 1
+fi
+
+set -x
+readonly BUILD_NAME="$1"
+readonly REPO_LIST="$2"
+
+cd "${JIRI_ROOT}"
+export GOPATH="${JIRI_ROOT}/infra/go:${JIRI_ROOT}/go"
+go build presubmit/submit-watch
+./submit-watch -logfile "/tmp/${BUILD_NAME}.watchlog.json" -project "${REPO_LIST}" -build "${BUILD_NAME}"