$ git clone -n https://gitee.com/opencloudos-stream/perl-Test-File-Contents.git /var/lib/mock/dist-oc9-epol-build-84091-57289/root/chroot_tmpdir/scmroot/perl-Test-File-Contents
Cloning into '/var/lib/mock/dist-oc9-epol-build-84091-57289/root/chroot_tmpdir/scmroot/perl-Test-File-Contents'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-Test-File-Contents
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5ce95b package init