$ git clone -n https://gitee.com/bbrucezhang/drbd.git /var/lib/mock/dist-oc9-epol-build-211040-80672/root/chroot_tmpdir/scmroot/drbd
Cloning into '/var/lib/mock/dist-oc9-epol-build-211040-80672/root/chroot_tmpdir/scmroot/drbd'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/bbrucezhang/drbd
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca86005 Add BuildRequires systemd-devel