$ git clone -n https://src.fedoraproject.org/rpms/ghc-async.git /var/lib/mock/f38-build-side-42-init-devel-641388-26392/root/chroot_tmpdir/scmroot/ghc-async
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-641388-26392/root/chroot_tmpdir/scmroot/ghc-async'...
$ git fetch origin 093e9ef54941d6d1ca0d58b7d417b00b0d2a641a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-async
 * [new ref]         093e9ef54941d6d1ca0d58b7d417b00b0d2a641a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 093e9ef Convert to %autorelease and %autochangelog