$ git clone -n https://gitee.com/opencloudos-stream/rust-mac.git /var/lib/mock/dist-oc9-epol-build-97725-60103/root/chroot_tmpdir/scmroot/rust-mac
Cloning into '/var/lib/mock/dist-oc9-epol-build-97725-60103/root/chroot_tmpdir/scmroot/rust-mac'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rust-mac
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33e481c update