$ git clone -n https://src.fedoraproject.org/rpms/aerc.git /var/lib/mock/f40-build-2368777-60387/root/chroot_tmpdir/scmroot/aerc
Cloning into '/var/lib/mock/f40-build-2368777-60387/root/chroot_tmpdir/scmroot/aerc'...
$ git fetch origin e198bd07b97f72599d5957129f4895b7ca82d6ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aerc
 * [new ref]         e198bd07b97f72599d5957129f4895b7ca82d6ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e198bd0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild