$ git clone -n https://src.fedoraproject.org/rpms/ghc-uglymemo.git /var/lib/mock/f39-build-1507255-35234/root/chroot_tmpdir/scmroot/ghc-uglymemo
Cloning into '/var/lib/mock/f39-build-1507255-35234/root/chroot_tmpdir/scmroot/ghc-uglymemo'...
$ git fetch origin 0ec152494f16f0e6b20caee0d78d783c820021f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-uglymemo
 * [new ref]         0ec152494f16f0e6b20caee0d78d783c820021f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ec1524 bump release