$ git clone -n https://gitee.com/src-opencloudos-rpms/procmail.git /var/lib/mock/dist-oc9-build-44120-14591/root/chroot_tmpdir/scmroot/procmail
Cloning into '/var/lib/mock/dist-oc9-build-44120-14591/root/chroot_tmpdir/scmroot/procmail'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/procmail
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8bd8668 import procmail-3.22-6.tl4