$ git clone -n https://src.fedoraproject.org/rpms/ghc-microlens-mtl.git /var/lib/mock/f39-build-1507371-35249/root/chroot_tmpdir/scmroot/ghc-microlens-mtl
Cloning into '/var/lib/mock/f39-build-1507371-35249/root/chroot_tmpdir/scmroot/ghc-microlens-mtl'...
$ git fetch origin 3b2e66d33eb1e6aee53afc7d02d165ab93f86731:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-microlens-mtl
 * [new ref]         3b2e66d33eb1e6aee53afc7d02d165ab93f86731 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b2e66d bump release