$ git clone -n https://src.fedoraproject.org/rpms/alt-ergo.git /var/lib/mock/f40-build-2260577-54413/root/chroot_tmpdir/scmroot/alt-ergo
Cloning into '/var/lib/mock/f40-build-2260577-54413/root/chroot_tmpdir/scmroot/alt-ergo'...
$ git fetch origin 2d515533aeafb538abc92fca4fbd324a57ea4b7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alt-ergo
 * [new ref]         2d515533aeafb538abc92fca4fbd324a57ea4b7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d51553 Rebuild for ocaml-num