$ git clone -n https://gitee.com/bbrucezhang/trafficserver.git /var/lib/mock/dist-oc9-epol-build-227431-81157/root/chroot_tmpdir/scmroot/trafficserver
Cloning into '/var/lib/mock/dist-oc9-epol-build-227431-81157/root/chroot_tmpdir/scmroot/trafficserver'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/bbrucezhang/trafficserver
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e69841 Update to 10.1.0