$ git clone -n https://gitee.com/opencloudos-stream/perl-File-LibMagic.git /var/lib/mock/dist-oc9-epol-build-77140-52697/root/chroot_tmpdir/scmroot/perl-File-LibMagic
Cloning into '/var/lib/mock/dist-oc9-epol-build-77140-52697/root/chroot_tmpdir/scmroot/perl-File-LibMagic'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-File-LibMagic
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3ba8c9 package init