$ git clone -n https://src.fedoraproject.org/rpms/ghc-STMonadTrans.git /var/lib/mock/f45-build-9944-411/root/chroot_tmpdir/scmroot/ghc-STMonadTrans
Cloning into '/var/lib/mock/f45-build-9944-411/root/chroot_tmpdir/scmroot/ghc-STMonadTrans'...
$ git fetch origin 63ff4d0f0ca274db0671b0b1e19b9cd3ebb7085f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-STMonadTrans
 * [new ref]         63ff4d0f0ca274db0671b0b1e19b9cd3ebb7085f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63ff4d0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild