$ git clone -n https://gitee.com/opencloudos-stream/pkgtreediff.git /var/lib/mock/dist-oc9-epol-build-227437-81158/root/chroot_tmpdir/scmroot/pkgtreediff
Cloning into '/var/lib/mock/dist-oc9-epol-build-227437-81158/root/chroot_tmpdir/scmroot/pkgtreediff'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/pkgtreediff
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c49b3b !3 Add numactl-devel to BuildRequires Merge pull request !3 from epol/master