$ git clone -n https://src.fedoraproject.org/rpms/cabal-rpm.git /var/lib/mock/f39-build-1979787-43339/root/chroot_tmpdir/scmroot/cabal-rpm
Cloning into '/var/lib/mock/f39-build-1979787-43339/root/chroot_tmpdir/scmroot/cabal-rpm'...
$ git fetch origin c66e4f2f831ab972bfd34cf80304f859b065ecec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cabal-rpm
 * [new ref]         c66e4f2f831ab972bfd34cf80304f859b065ecec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c66e4f2 fixup! https://hackage.haskell.org/package/cabal-rpm-2.1.5/changelog