$ git clone -n https://gitee.com/pkm031/systemd.git /var/lib/mock/dist-an23-build-476234-74203/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-an23-build-476234-74203/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin edff70d9189cb5a86c066669318fa44c2362626d:KOJI_FETCH_HEAD
From https://gitee.com/pkm031/systemd
 * [new ref]         edff70d9189cb5a86c066669318fa44c2362626d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at edff70d print-backtrack-log-to-var-log-messages