$ git clone -n https://src.fedoraproject.org/rpms/perl-ZMQ-LibZMQ4.git /var/lib/mock/f41-build-816497-150225/root/chroot_tmpdir/scmroot/perl-ZMQ-LibZMQ4
Cloning into '/var/lib/mock/f41-build-816497-150225/root/chroot_tmpdir/scmroot/perl-ZMQ-LibZMQ4'...
$ git fetch origin aa2e61fa11a7939d4be2b70389e4bbc7c801721c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ZMQ-LibZMQ4
 * [new ref]         aa2e61fa11a7939d4be2b70389e4bbc7c801721c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa2e61f Perl 5.40 rebuild