$ git clone -n https://gitee.com/src-opencloudos-rpms/gc.git /var/lib/mock/dist-oc9-build-69855-47352/root/chroot_tmpdir/scmroot/gc
Cloning into '/var/lib/mock/dist-oc9-build-69855-47352/root/chroot_tmpdir/scmroot/gc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88dfc6a import gc-8.2.4-1.tl4