$ git clone -n https://gitee.com/src-opencloudos-rpms/mbedtls.git /var/lib/mock/dist-oc9-epol-build-54500-14768/root/chroot_tmpdir/scmroot/mbedtls
Cloning into '/var/lib/mock/dist-oc9-epol-build-54500-14768/root/chroot_tmpdir/scmroot/mbedtls'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mbedtls
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3451b34 import mbedtls-2.28.3-2.tl4