$ git clone -n https://gitee.com/src-opencloudos-rpms/emacs.git /var/lib/mock/dist-oc8-build-73383-48915/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/dist-oc8-build-73383-48915/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin 03fc851397197fe7e03ef70d7fa204427ca829e1:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/emacs
 * [new ref]         03fc851397197fe7e03ef70d7fa204427ca829e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03fc851 import emacs-26.1-11.tl3