$ git clone -n https://gitee.com/src-opencloudos-rpms/ecj.git /var/lib/mock/dist-oc8-build-76986-52558/root/chroot_tmpdir/scmroot/ecj
Cloning into '/var/lib/mock/dist-oc8-build-76986-52558/root/chroot_tmpdir/scmroot/ecj'...
$ git fetch origin ee192a171afa8cf7bca168638288b8ec5818d203:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/ecj
 * [new ref]         ee192a171afa8cf7bca168638288b8ec5818d203 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee192a1 import ecj-4.20-11.tl3