$ git clone -n https://gitee.com/src-opencloudos-rpms/dtc.git /var/lib/mock/dist-oc9-build-127001-76418/root/chroot_tmpdir/scmroot/dtc
Cloning into '/var/lib/mock/dist-oc9-build-127001-76418/root/chroot_tmpdir/scmroot/dtc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/dtc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 238af62 import dtc-1.7.0-4.tl4