$ git clone -n https://src.fedoraproject.org/rpms/ghc-io-streams.git /var/lib/mock/f45-build-10456-418/root/chroot_tmpdir/scmroot/ghc-io-streams
Cloning into '/var/lib/mock/f45-build-10456-418/root/chroot_tmpdir/scmroot/ghc-io-streams'...
$ git fetch origin 37f6e623ecccacad7c06c64fba4a309ca2ecf5c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-io-streams
 * [new ref]         37f6e623ecccacad7c06c64fba4a309ca2ecf5c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 37f6e62 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild