$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-IDN-PP.git /var/lib/mock/f45-build-25294-610/root/chroot_tmpdir/scmroot/perl-Net-IDN-PP
Cloning into '/var/lib/mock/f45-build-25294-610/root/chroot_tmpdir/scmroot/perl-Net-IDN-PP'...
$ git fetch origin 766d067c8611008c8c72c3db78d80d63ddef2c6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-IDN-PP
 * [new ref]         766d067c8611008c8c72c3db78d80d63ddef2c6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 766d067 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild