$ git clone -n https://gitee.com/src-opencloudos-rpms/mpfr.git /var/lib/mock/dist-oc9-build-60218-16463/root/chroot_tmpdir/scmroot/mpfr
Cloning into '/var/lib/mock/dist-oc9-build-60218-16463/root/chroot_tmpdir/scmroot/mpfr'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mpfr
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3238ae8 import mpfr-4.2.0-2.tl4