$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Test-Warn.git /var/lib/mock/dist-oc9-build-59262-16463/root/chroot_tmpdir/scmroot/perl-Test-Warn
Cloning into '/var/lib/mock/dist-oc9-build-59262-16463/root/chroot_tmpdir/scmroot/perl-Test-Warn'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Test-Warn
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0582f32 import perl-Test-Warn-0.36-5.tl4