$ git clone -n https://src.fedoraproject.org/rpms/perl-Ham-Reference-QRZ.git /var/lib/mock/f45-build-24073-601/root/chroot_tmpdir/scmroot/perl-Ham-Reference-QRZ
Cloning into '/var/lib/mock/f45-build-24073-601/root/chroot_tmpdir/scmroot/perl-Ham-Reference-QRZ'...
$ git fetch origin 861fd7eb61b6584530342593a6c1f1857fa8c389:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Ham-Reference-QRZ
 * [new ref]         861fd7eb61b6584530342593a6c1f1857fa8c389 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 861fd7e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild