$ git clone -n https://src.fedoraproject.org/rpms/ghc-microlens-platform.git /var/lib/mock/f39-build-2187925-51398/root/chroot_tmpdir/scmroot/ghc-microlens-platform
Cloning into '/var/lib/mock/f39-build-2187925-51398/root/chroot_tmpdir/scmroot/ghc-microlens-platform'...
$ git fetch origin d4c7c119b67db3a2fc13c64f0dec85398788629e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-microlens-platform
 * [new ref]         d4c7c119b67db3a2fc13c64f0dec85398788629e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4c7c11 https://hackage.haskell.org/package/microlens-platform-0.4.3.3/changelog