$ git clone -n https://gitee.com/src-opencloudos-rpms/blktrace.git /var/lib/mock/dist-oc9-build-40719-14590/root/chroot_tmpdir/scmroot/blktrace
Cloning into '/var/lib/mock/dist-oc9-build-40719-14590/root/chroot_tmpdir/scmroot/blktrace'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/blktrace
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17497f6 import blktrace-1.3.0-3.tl4