$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Report.git /var/lib/mock/f45-build-22893-594/root/chroot_tmpdir/scmroot/perl-Data-Report
Cloning into '/var/lib/mock/f45-build-22893-594/root/chroot_tmpdir/scmroot/perl-Data-Report'...
$ git fetch origin 8d5095e0dcfe108392614391605755e63cbd77d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Report
 * [new ref]         8d5095e0dcfe108392614391605755e63cbd77d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d5095e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild