$ git clone -n https://gitee.com/opencloudos-stream/diffutils.git /var/lib/mock/dist-ocs23-build-233744-20061/root/chroot_tmpdir/scmroot/diffutils
Cloning into '/var/lib/mock/dist-ocs23-build-233744-20061/root/chroot_tmpdir/scmroot/diffutils'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/diffutils
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc1a09d Rebuilt for loongarch release