$ git clone -n https://src.fedoraproject.org/rpms/ghc-hakyll.git /var/lib/mock/f38-build-side-42-init-devel-842174-28416/root/chroot_tmpdir/scmroot/ghc-hakyll
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-842174-28416/root/chroot_tmpdir/scmroot/ghc-hakyll'...
$ git fetch origin 6748e7617e51a1993c108af6c875dda1f840b381:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hakyll
 * [new ref]         6748e7617e51a1993c108af6c875dda1f840b381 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6748e76 Convert to %autorelease and %autochangelog