$ git clone -n https://gitee.com/mgb01105731/sisu.git /var/lib/mock/dist-an23-build-336859-69699/root/chroot_tmpdir/scmroot/sisu
Cloning into '/var/lib/mock/dist-an23-build-336859-69699/root/chroot_tmpdir/scmroot/sisu'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/sisu
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa13286 rebuild