$ git clone -n https://src.fedoraproject.org/rpms/libs3.git /var/lib/mock/f45-build-16920-493/root/chroot_tmpdir/scmroot/libs3
Cloning into '/var/lib/mock/f45-build-16920-493/root/chroot_tmpdir/scmroot/libs3'...
$ git fetch origin edeb5399a24858bd0f70588c9435113c51fbd540:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libs3
 * [new ref]         edeb5399a24858bd0f70588c9435113c51fbd540 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at edeb539 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild