$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Sys-Syslog.git /var/lib/mock/dist-oc9-build-61527-16463/root/chroot_tmpdir/scmroot/perl-Sys-Syslog
Cloning into '/var/lib/mock/dist-oc9-build-61527-16463/root/chroot_tmpdir/scmroot/perl-Sys-Syslog'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Sys-Syslog
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86856a6 import perl-Sys-Syslog-0.36-5.tl4