$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Mail-DKIM.git /var/lib/mock/dist-oc9-build-129900-78001/root/chroot_tmpdir/scmroot/perl-Mail-DKIM
Cloning into '/var/lib/mock/dist-oc9-build-129900-78001/root/chroot_tmpdir/scmroot/perl-Mail-DKIM'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Mail-DKIM
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38e65e7 import perl-Mail-DKIM-1.20220520-6.tl4