$ git clone -n https://src.fedoraproject.org/rpms/ghc-pem.git /var/lib/mock/f38-build-side-42-init-devel-719756-27296/root/chroot_tmpdir/scmroot/ghc-pem
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-719756-27296/root/chroot_tmpdir/scmroot/ghc-pem'...
$ git fetch origin 8d3a30eca8d54a30fbbc22a8bb6ad8c3794a1286:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-pem
 * [new ref]         8d3a30eca8d54a30fbbc22a8bb6ad8c3794a1286 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d3a30e Convert to %autorelease and %autochangelog