$ git clone -n https://gitee.com/src-opencloudos-rpms/emacs.git /var/lib/mock/dist-oc8-build-252629-84214/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/dist-oc8-build-252629-84214/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin 4ee84512ac3beb6902eb7f3ecb59b93c15c2b9a7:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/emacs
 * [new ref]         4ee84512ac3beb6902eb7f3ecb59b93c15c2b9a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ee8451 import emacs-26.1-15.tl3.2