$ git clone -n https://gitee.com/src-opencloudos-rpms/ltrace.git /var/lib/mock/dist-oc9-build-62505-16463/root/chroot_tmpdir/scmroot/ltrace
Cloning into '/var/lib/mock/dist-oc9-build-62505-16463/root/chroot_tmpdir/scmroot/ltrace'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/ltrace
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e34b588 import ltrace-0.7.91-4.git0670fae5.tl4