$ git clone -n https://gitee.com/opencloudos-stream/debmirror.git /var/lib/mock/dist-oc9-epol-build-139858-79709/root/chroot_tmpdir/scmroot/debmirror
Cloning into '/var/lib/mock/dist-oc9-epol-build-139858-79709/root/chroot_tmpdir/scmroot/debmirror'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/debmirror
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16c3079 !1 Rebuilt for loongarch64 Merge pull request !1 from brucezhang/master