$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-TCP.git /var/lib/mock/f45-build-26862-619/root/chroot_tmpdir/scmroot/perl-Test-TCP
Cloning into '/var/lib/mock/f45-build-26862-619/root/chroot_tmpdir/scmroot/perl-Test-TCP'...
$ git fetch origin 7480d043e23246ec4f989a6f8b973468c8a62487:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-TCP
 * [new ref]         7480d043e23246ec4f989a6f8b973468c8a62487 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7480d04 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild