$ git clone -n https://gitee.com/src-opencloudos-rpms/emacs /var/lib/mock/dist-oc8-build-56903-15178/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/dist-oc8-build-56903-15178/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/emacs
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f771a9 import emacs-26.1-10.tl3.2.2