$ git clone -n https://gitee.com/src-opencloudos-rpms/libblockdev.git /var/lib/mock/dist-oc8-build-173959-79857/root/chroot_tmpdir/scmroot/libblockdev
Cloning into '/var/lib/mock/dist-oc8-build-173959-79857/root/chroot_tmpdir/scmroot/libblockdev'...
$ git fetch origin d20dceff562ce27b66aefeb0c18c4d467288ba5a:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libblockdev
 * [new ref]         d20dceff562ce27b66aefeb0c18c4d467288ba5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d20dcef import libblockdev-2.28-7.tl3