$ git clone -n https://gitee.com/src-opencloudos-rpms/grpc.git /var/lib/mock/dist-oc9-build-52715-14602/root/chroot_tmpdir/scmroot/grpc
Cloning into '/var/lib/mock/dist-oc9-build-52715-14602/root/chroot_tmpdir/scmroot/grpc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grpc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e7c5f9 import grpc-1.48.1-3.tl4