$ git clone -n https://gitee.com/src-opencloudos-rpms/libblockdev.git /var/lib/mock/dist-oc9-build-70267-47411/root/chroot_tmpdir/scmroot/libblockdev
Cloning into '/var/lib/mock/dist-oc9-build-70267-47411/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 59a19c3 import libblockdev-3.1.0-1.tl4