$ git clone -n https://gitee.com/mgb01105731/memcached.git /var/lib/mock/dist-an23.2-build-422785-72922/root/chroot_tmpdir/scmroot/memcached
Cloning into '/var/lib/mock/dist-an23.2-build-422785-72922/root/chroot_tmpdir/scmroot/memcached'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/memcached
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8decc18 Update to 1.6.23 from 1.6.22