$ git clone -n https://src.fedoraproject.org/rpms/perl-Perl-PrereqScanner.git /var/lib/mock/f45-build-25797-613/root/chroot_tmpdir/scmroot/perl-Perl-PrereqScanner
Cloning into '/var/lib/mock/f45-build-25797-613/root/chroot_tmpdir/scmroot/perl-Perl-PrereqScanner'...
$ git fetch origin 459eb59c992364badc000f4bb1edcf44944129cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Perl-PrereqScanner
 * [new ref]         459eb59c992364badc000f4bb1edcf44944129cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 459eb59 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild