$ git clone -n https://gitee.com/mgb01105731/dtc.git /var/lib/mock/dist-an23.2-build-425090-72922/root/chroot_tmpdir/scmroot/dtc
Cloning into '/var/lib/mock/dist-an23.2-build-425090-72922/root/chroot_tmpdir/scmroot/dtc'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/dtc
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd9995d Update to 1.7.0 from 1.6.1