$ git clone -n https://src.fedoraproject.org/rpms/ghc-rio-prettyprint.git /var/lib/mock/f38-build-side-42-init-devel-1001136-29279/root/chroot_tmpdir/scmroot/ghc-rio-prettyprint
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1001136-29279/root/chroot_tmpdir/scmroot/ghc-rio-prettyprint'...
$ git fetch origin a02741a83b577ef07d8b371d2f9790431fd3ba42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-rio-prettyprint
 * [new ref]         a02741a83b577ef07d8b371d2f9790431fd3ba42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a02741a Convert to %autorelease and %autochangelog