$ git clone -n https://src.fedoraproject.org/rpms/ghc-haddock-library.git /var/lib/mock/f45-build-10368-416/root/chroot_tmpdir/scmroot/ghc-haddock-library
Cloning into '/var/lib/mock/f45-build-10368-416/root/chroot_tmpdir/scmroot/ghc-haddock-library'...
$ git fetch origin 63d39041198fc3852861e7bc3fb97e758f2480d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haddock-library
 * [new ref]         63d39041198fc3852861e7bc3fb97e758f2480d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63d3904 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild