$ git clone -n https://gitee.com/zhoujiajia111/emacs.git /var/lib/mock/dist-an23-build-445241-73273/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/dist-an23-build-445241-73273/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin e28cecf1fa22297739af0476fb3bf592cd6acc49:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/emacs
 * [new ref]         e28cecf1fa22297739af0476fb3bf592cd6acc49 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e28cecf remove BuildRequire webkit2gtk3-devel