$ git clone -n https://gitee.com/fundawang/rust.git /var/lib/mock/dist-an23-build-184590-60444/root/chroot_tmpdir/scmroot/rust
Cloning into '/var/lib/mock/dist-an23-build-184590-60444/root/chroot_tmpdir/scmroot/rust'...
$ git fetch origin 523831ef9be480450df313c34414dbe0d56267c6:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/rust
 * [new ref]         523831ef9be480450df313c34414dbe0d56267c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 523831e 2nd round rebuild without bootstrap