$ git clone -n https://src.fedoraproject.org/rpms/ghc-MonadCatchIO-transformers.git /var/lib/mock/f41-build-side-1-2811401-32930/root/chroot_tmpdir/scmroot/ghc-MonadCatchIO-transformers
Cloning into '/var/lib/mock/f41-build-side-1-2811401-32930/root/chroot_tmpdir/scmroot/ghc-MonadCatchIO-transformers'...
$ git fetch origin 98dad8816a8beec7f69f873d7e8c2761323a4b16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-MonadCatchIO-transformers
 * [new ref]         98dad8816a8beec7f69f873d7e8c2761323a4b16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98dad88 retired: FTBFS and last release 10 years ago