$ git clone -n https://gitee.com/opencloudos-stream/perl-Email-Simple.git /var/lib/mock/dist-oc9-epol-build-77095-52685/root/chroot_tmpdir/scmroot/perl-Email-Simple
Cloning into '/var/lib/mock/dist-oc9-epol-build-77095-52685/root/chroot_tmpdir/scmroot/perl-Email-Simple'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-Email-Simple
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd86b3e package init