$ git clone -n https://gitee.com/src-opencloudos-rpms/libblockdev.git /var/lib/mock/dist-oc9-build-59246-16463/root/chroot_tmpdir/scmroot/libblockdev
Cloning into '/var/lib/mock/dist-oc9-build-59246-16463/root/chroot_tmpdir/scmroot/libblockdev'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libblockdev
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b535844 import libblockdev-3.0.2-4.tl4