-RUN git clone https://gerrit.opnfv.org/gerrit/yardstick ${YARDSTICK_REPO_DIR}
-RUN git clone https://gerrit.opnfv.org/gerrit/releng ${RELENG_REPO_DIR}
+RUN git clone --depth 1 -b $BRANCH https://gerrit.opnfv.org/gerrit/yardstick ${YARDSTICK_REPO_DIR}
+RUN git clone --depth 1 https://gerrit.opnfv.org/gerrit/releng ${RELENG_REPO_DIR}