$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Date-Calc.git /var/lib/mock/dist-oc9-build-60961-16463/root/chroot_tmpdir/scmroot/perl-Date-Calc
Cloning into '/var/lib/mock/dist-oc9-build-60961-16463/root/chroot_tmpdir/scmroot/perl-Date-Calc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Date-Calc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2119bcc import perl-Date-Calc-6.4-5.tl4