$ git clone -n https://gitee.com/src-opencloudos-rpms/rpm.git /var/lib/mock/dist-oc9-build-121622-71708/root/chroot_tmpdir/scmroot/rpm
Cloning into '/var/lib/mock/dist-oc9-build-121622-71708/root/chroot_tmpdir/scmroot/rpm'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/rpm
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1bb0db import rpm-4.18.2-4.tl4