$ git clone -n https://gitee.com/src-opencloudos-rpms/devhelp.git /var/lib/mock/dist-oc9-build-63837-16463/root/chroot_tmpdir/scmroot/devhelp
Cloning into '/var/lib/mock/dist-oc9-build-63837-16463/root/chroot_tmpdir/scmroot/devhelp'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/devhelp
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ad4c61 import devhelp-43.0-5.tl4