$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-default-class.git /var/lib/mock/f38-build-side-42-init-devel-656636-26596/root/chroot_tmpdir/scmroot/ghc-data-default-class
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-656636-26596/root/chroot_tmpdir/scmroot/ghc-data-default-class'...
$ git fetch origin 0bfabc04dbb24e68d21449d0b13a4854914706c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-data-default-class
 * [new ref]         0bfabc04dbb24e68d21449d0b13a4854914706c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0bfabc0 Convert to %autorelease and %autochangelog