$ git clone -n https://gitee.com/opencloudos-stream/perl-GD.git /var/lib/mock/dist-oc9-epol-build-94319-59554/root/chroot_tmpdir/scmroot/perl-GD
Cloning into '/var/lib/mock/dist-oc9-epol-build-94319-59554/root/chroot_tmpdir/scmroot/perl-GD'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-GD
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31c1066 package init