$ git clone -n https://src.fedoraproject.org/rpms/ghc-threads.git /var/lib/mock/f38-build-side-42-init-devel-900544-28589/root/chroot_tmpdir/scmroot/ghc-threads
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-900544-28589/root/chroot_tmpdir/scmroot/ghc-threads'...
$ git fetch origin 9cb390efb003a6ee998d63f35912834f1aaf0ce9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-threads
 * [new ref]         9cb390efb003a6ee998d63f35912834f1aaf0ce9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cb390e Convert to %autorelease and %autochangelog