$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-IPv4Addr.git /var/lib/mock/f45-build-25321-610/root/chroot_tmpdir/scmroot/perl-Net-IPv4Addr
Cloning into '/var/lib/mock/f45-build-25321-610/root/chroot_tmpdir/scmroot/perl-Net-IPv4Addr'...
$ git fetch origin fe5ab8d5d6fd91b027de672be95fbb3ce2edf5ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-IPv4Addr
 * [new ref]         fe5ab8d5d6fd91b027de672be95fbb3ce2edf5ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe5ab8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild