$ git clone -n https://gitee.com/opencloudos-stream/rust-chardetng.git /var/lib/mock/dist-oc9-epol-build-96551-59860/root/chroot_tmpdir/scmroot/rust-chardetng
Cloning into '/var/lib/mock/dist-oc9-epol-build-96551-59860/root/chroot_tmpdir/scmroot/rust-chardetng'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rust-chardetng
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86f4a4e update