$ git clone -n https://gitee.com/pkm031/systemd.git /var/lib/mock/dist-an23-build-474227-74190/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-an23-build-474227-74190/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin a9eb8b0ba865df5dba61a0e323d4f4ad9cac516e:KOJI_FETCH_HEAD
From https://gitee.com/pkm031/systemd
 * [new ref]         a9eb8b0ba865df5dba61a0e323d4f4ad9cac516e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9eb8b0 print-backtrack-log-to-var-log-messages