$ git clone -n https://src.fedoraproject.org/rpms/ghc-abstract-par.git /var/lib/mock/f38-build-side-42-init-devel-737703-27649/root/chroot_tmpdir/scmroot/ghc-abstract-par
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-737703-27649/root/chroot_tmpdir/scmroot/ghc-abstract-par'...
$ git fetch origin 88d19be6ea45b91f2d40beba9e193b255b43a49b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-abstract-par
 * [new ref]         88d19be6ea45b91f2d40beba9e193b255b43a49b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88d19be Convert to %autorelease and %autochangelog