$ git clone -n https://src.fedoraproject.org/rpms/ghc-ghc-paths.git /var/lib/mock/f38-build-side-42-init-devel-908253-28676/root/chroot_tmpdir/scmroot/ghc-ghc-paths
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-908253-28676/root/chroot_tmpdir/scmroot/ghc-ghc-paths'...
$ git fetch origin aa64cdbe6ce15afa3e878e1c18b6adda9c31fb99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-ghc-paths
 * [new ref]         aa64cdbe6ce15afa3e878e1c18b6adda9c31fb99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa64cdb Convert to %autorelease and %autochangelog