$ git clone -n https://gitee.com/mgb01105731/mosquitto.git /var/lib/mock/dist-an23-build-287046-64835/root/chroot_tmpdir/scmroot/mosquitto
Cloning into '/var/lib/mock/dist-an23-build-287046-64835/root/chroot_tmpdir/scmroot/mosquitto'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/mosquitto
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b024d3 init upstream from version 2.0.15