$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-lexer.git /var/lib/mock/f45-build-10372-416/root/chroot_tmpdir/scmroot/ghc-haskell-lexer
Cloning into '/var/lib/mock/f45-build-10372-416/root/chroot_tmpdir/scmroot/ghc-haskell-lexer'...
$ git fetch origin 6a4fc76552f508d43f15b74cae8acbed3ef02eea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-lexer
 * [new ref]         6a4fc76552f508d43f15b74cae8acbed3ef02eea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a4fc76 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild