$ git clone -n https://gitee.com/src-opencloudos-rpms/libev.git /var/lib/mock/dist-oc9-la64-build-132510-78829/root/chroot_tmpdir/scmroot/libev
Cloning into '/var/lib/mock/dist-oc9-la64-build-132510-78829/root/chroot_tmpdir/scmroot/libev'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libev
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f3b3a9 import libev-4.33-8.tl4