$ git clone -n https://src.fedoraproject.org/rpms/ghc-optparse-applicative.git /var/lib/mock/f39-build-1992871-43416/root/chroot_tmpdir/scmroot/ghc-optparse-applicative
Cloning into '/var/lib/mock/f39-build-1992871-43416/root/chroot_tmpdir/scmroot/ghc-optparse-applicative'...
$ git fetch origin fa6dae373ec092166b7f2b9bd70a71e92576707c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-optparse-applicative
 * [new ref]         fa6dae373ec092166b7f2b9bd70a71e92576707c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa6dae3 https://hackage.haskell.org/package/optparse-applicative-0.17.1.0/changelog