$ git clone -n https://src.fedoraproject.org/rpms/ghc-appar.git /var/lib/mock/f38-build-side-42-init-devel-866075-28439/root/chroot_tmpdir/scmroot/ghc-appar
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-866075-28439/root/chroot_tmpdir/scmroot/ghc-appar'...
$ git fetch origin 53490d45d20c3e3353f904c45c6b9c35a1e68dfc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-appar
 * [new ref]         53490d45d20c3e3353f904c45c6b9c35a1e68dfc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53490d4 Convert to %autorelease and %autochangelog