$ git clone -n https://src.fedoraproject.org/rpms/ghc-optparse-simple.git /var/lib/mock/f45-build-10587-419/root/chroot_tmpdir/scmroot/ghc-optparse-simple
Cloning into '/var/lib/mock/f45-build-10587-419/root/chroot_tmpdir/scmroot/ghc-optparse-simple'...
$ git fetch origin e6e7b50eafc47ab777dce90a7aa4c18878bf9601:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-optparse-simple
 * [new ref]         e6e7b50eafc47ab777dce90a7aa4c18878bf9601 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6e7b50 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild