$ git clone -n https://src.fedoraproject.org/rpms/perl-Convert-BER.git /var/lib/mock/f45-build-22566-593/root/chroot_tmpdir/scmroot/perl-Convert-BER
Cloning into '/var/lib/mock/f45-build-22566-593/root/chroot_tmpdir/scmroot/perl-Convert-BER'...
$ git fetch origin f1a55834ef45b93bd0ebd5940e11d8d3d7331429:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Convert-BER
 * [new ref]         f1a55834ef45b93bd0ebd5940e11d8d3d7331429 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1a5583 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild