$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-reify.git /var/lib/mock/f38-build-side-42-init-devel-700950-27067/root/chroot_tmpdir/scmroot/ghc-data-reify
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-700950-27067/root/chroot_tmpdir/scmroot/ghc-data-reify'...
$ git fetch origin ef8bd8d010420a2d559dfe862c92bd8fc76f13a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-data-reify
 * [new ref]         ef8bd8d010420a2d559dfe862c92bd8fc76f13a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef8bd8d Convert to %autorelease and %autochangelog