$ git clone -n https://gitee.com/opencloudos-stream/rust-block-buffer0.9.git /var/lib/mock/dist-oc9-epol-build-86878-57890/root/chroot_tmpdir/scmroot/rust-block-buffer0.9
Cloning into '/var/lib/mock/dist-oc9-epol-build-86878-57890/root/chroot_tmpdir/scmroot/rust-block-buffer0.9'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rust-block-buffer0.9
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2827b49 update