$ git clone -n https://gitee.com/mgb01105731/docbook5-schemas.git /var/lib/mock/dist-an27-build-527702-79680/root/chroot_tmpdir/scmroot/docbook5-schemas
Cloning into '/var/lib/mock/dist-an27-build-527702-79680/root/chroot_tmpdir/scmroot/docbook5-schemas'...
$ git fetch origin a27:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/docbook5-schemas
 * [new branch]      a27        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd077fc Init package