$ git clone -n https://gitee.com/opencloudos-stream/perl-Carp-Always.git /var/lib/mock/dist-oc9-epol-build-93357-59419/root/chroot_tmpdir/scmroot/perl-Carp-Always
Cloning into '/var/lib/mock/dist-oc9-epol-build-93357-59419/root/chroot_tmpdir/scmroot/perl-Carp-Always'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-Carp-Always
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d438e1c update