$ git clone -n https://gitee.com/opencloudos-stream/rust-bstr.git /var/lib/mock/dist-oc9-epol-build-86910-57893/root/chroot_tmpdir/scmroot/rust-bstr
Cloning into '/var/lib/mock/dist-oc9-epol-build-86910-57893/root/chroot_tmpdir/scmroot/rust-bstr'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rust-bstr
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebd8a89 update