$ git clone -n https://gitee.com/src-opencloudos-rpms/libotr.git /var/lib/mock/dist-oc9-build-128438-77325/root/chroot_tmpdir/scmroot/libotr
Cloning into '/var/lib/mock/dist-oc9-build-128438-77325/root/chroot_tmpdir/scmroot/libotr'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libotr
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18036c9 import libotr-4.1.1-6.tl4