$ git clone -n https://src.fedoraproject.org/rpms/ghc-formatting.git /var/lib/mock/f38-build-side-42-init-devel-912728-28701/root/chroot_tmpdir/scmroot/ghc-formatting
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-912728-28701/root/chroot_tmpdir/scmroot/ghc-formatting'...
$ git fetch origin b3daada568339f04f379f4f8a0d465f4c821eafc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-formatting
 * [new ref]         b3daada568339f04f379f4f8a0d465f4c821eafc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3daada fixup! testsuite: ppc64le RTS does not have -rtsopts=-N