$ git clone -n https://gitee.com/opencloudos-stream/c2hs.git /var/lib/mock/dist-oc9-epol-build-107360-67062/root/chroot_tmpdir/scmroot/c2hs
Cloning into '/var/lib/mock/dist-oc9-epol-build-107360-67062/root/chroot_tmpdir/scmroot/c2hs'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/c2hs
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e4219e update