$ git clone -n https://gitee.com/src-opencloudos-rpms/libblockdev /var/lib/mock/dist-oc8-build-57971-15832/root/chroot_tmpdir/scmroot/libblockdev
Cloning into '/var/lib/mock/dist-oc8-build-57971-15832/root/chroot_tmpdir/scmroot/libblockdev'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libblockdev
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eea7e62 import libblockdev-2.28-4.tl3