$ git clone -n https://src.fedoraproject.org/rpms/ghc-hosc.git /var/lib/mock/f38-build-side-42-init-devel-861617-28428/root/chroot_tmpdir/scmroot/ghc-hosc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-861617-28428/root/chroot_tmpdir/scmroot/ghc-hosc'...
$ git fetch origin 03f7ef929180f8acdf16061de7b76d974c96f0fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hosc
 * [new ref]         03f7ef929180f8acdf16061de7b76d974c96f0fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03f7ef9 Convert to %autorelease and %autochangelog