$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-MonadCatchIO-transformers.git /var/lib/mock/f39-build-2225284-52816/root/chroot_tmpdir/scmroot/ghc-MonadCatchIO-transformers
Cloning into '/var/lib/mock/f39-build-2225284-52816/root/chroot_tmpdir/scmroot/ghc-MonadCatchIO-transformers'...
$ git fetch origin 1dff28abc467f7859d286841e831a968cce4351e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-MonadCatchIO-transformers
 * [new ref]         1dff28abc467f7859d286841e831a968cce4351e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1dff28a rv64 rebuild