$ git clone -n https://src.fedoraproject.org/rpms/perl-ExtUtils-Helpers.git /var/lib/mock/f45-build-23343-597/root/chroot_tmpdir/scmroot/perl-ExtUtils-Helpers
Cloning into '/var/lib/mock/f45-build-23343-597/root/chroot_tmpdir/scmroot/perl-ExtUtils-Helpers'...
$ git fetch origin feaa01e98cdaaf32234d20728582da8ed53dac4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ExtUtils-Helpers
 * [new ref]         feaa01e98cdaaf32234d20728582da8ed53dac4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at feaa01e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild