$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-Amazon-S3.git /var/lib/mock/f45-build-25232-610/root/chroot_tmpdir/scmroot/perl-Net-Amazon-S3
Cloning into '/var/lib/mock/f45-build-25232-610/root/chroot_tmpdir/scmroot/perl-Net-Amazon-S3'...
$ git fetch origin 4761e5915137fa028b63eb4303655f7f17e8b0bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-Amazon-S3
 * [new ref]         4761e5915137fa028b63eb4303655f7f17e8b0bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4761e59 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild