$ git clone -n https://gitee.com/src-opencloudos-rpms/libblockdev.git /var/lib/mock/dist-oc8-build-168623-79806/root/chroot_tmpdir/scmroot/libblockdev
Cloning into '/var/lib/mock/dist-oc8-build-168623-79806/root/chroot_tmpdir/scmroot/libblockdev'...
$ git fetch origin 9f765e55791e4ab51d666764f6a9fc8d87017747:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libblockdev
 * [new ref]         9f765e55791e4ab51d666764f6a9fc8d87017747 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f765e5 import libblockdev-2.28-6.tl3.1