fix: specify revision to diff against when using arc
# limitations under the License.
# TODO(#3173): remove need for arcanist
-arc lint
+arc lint --rev HEAD
# TODO(#3173): remove need for arcanist
-WAIT_FOR_BAZEL=1 USE_BAZELRC=1 arc unit
+WAIT_FOR_BAZEL=1 USE_BAZELRC=1 arc unit --rev HEAD
