$ git clone -n https://src.fedoraproject.org/rpms/ghc-cabal-file-th.git /var/lib/mock/f45-build-10079-413/root/chroot_tmpdir/scmroot/ghc-cabal-file-th
Cloning into '/var/lib/mock/f45-build-10079-413/root/chroot_tmpdir/scmroot/ghc-cabal-file-th'...
$ git fetch origin ffac258c0c5e4ba5b797c5f7d9db4aeb25dd94a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cabal-file-th
 * [new ref]         ffac258c0c5e4ba5b797c5f7d9db4aeb25dd94a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffac258 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild