$ git clone -n https://src.fedoraproject.org/rpms/perl-Hash-StoredIterator.git /var/lib/mock/f41-build-816439-150177/root/chroot_tmpdir/scmroot/perl-Hash-StoredIterator
Cloning into '/var/lib/mock/f41-build-816439-150177/root/chroot_tmpdir/scmroot/perl-Hash-StoredIterator'...
$ git fetch origin 2b0231f88b2a9991ce211b0c27959ff6dd86cc0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Hash-StoredIterator
 * [new ref]         2b0231f88b2a9991ce211b0c27959ff6dd86cc0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b0231f Perl 5.40 rebuild