$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-MonadCatchIO-transformers.git /var/lib/mock/f39-build-2227576-53024/root/chroot_tmpdir/scmroot/ghc-MonadCatchIO-transformers
Cloning into '/var/lib/mock/f39-build-2227576-53024/root/chroot_tmpdir/scmroot/ghc-MonadCatchIO-transformers'...
$ git fetch origin 71cad46e1349119ef3fadb2ef082448ba11983f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-MonadCatchIO-transformers
 * [new ref]         71cad46e1349119ef3fadb2ef082448ba11983f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71cad46 rv64 rebuild