$ git clone -n https://gitee.com/opencloudos-stream/unicorn.git /var/lib/mock/dist-oc9-epol-build-186528-80302/root/chroot_tmpdir/scmroot/unicorn
Cloning into '/var/lib/mock/dist-oc9-epol-build-186528-80302/root/chroot_tmpdir/scmroot/unicorn'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/unicorn
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66b3b49 !2 disable on loongarch64 Merge pull request !2 from zhangwenlong01/master