$ git clone -n https://src.fedoraproject.org/rpms/libs3.git /var/lib/mock/f40-build-784667-133496/root/chroot_tmpdir/scmroot/libs3
Cloning into '/var/lib/mock/f40-build-784667-133496/root/chroot_tmpdir/scmroot/libs3'...
$ git fetch origin 8c5dbcaa1beeff7e415f8acd1cc54e7cbe4cab0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libs3
 * [new ref]         8c5dbcaa1beeff7e415f8acd1cc54e7cbe4cab0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c5dbca Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild