$ git clone -n https://gitee.com/src-opencloudos-rpms/byaccj.git /var/lib/mock/dist-oc9-build-69555-47305/root/chroot_tmpdir/scmroot/byaccj
Cloning into '/var/lib/mock/dist-oc9-build-69555-47305/root/chroot_tmpdir/scmroot/byaccj'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/byaccj
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2381a6 import byaccj-1.15-4.tl4