$ git clone -n https://src.fedoraproject.org/rpms/ghc-cabal-doctest.git /var/lib/mock/f45-build-10068-413/root/chroot_tmpdir/scmroot/ghc-cabal-doctest
Cloning into '/var/lib/mock/f45-build-10068-413/root/chroot_tmpdir/scmroot/ghc-cabal-doctest'...
$ git fetch origin 6da9f8d70fcee6c7f3701d61fe8b4bcab88d7d5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cabal-doctest
 * [new ref]         6da9f8d70fcee6c7f3701d61fe8b4bcab88d7d5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6da9f8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild