$ git clone -n https://src.fedoraproject.org/rpms/ghc-base-prelude.git /var/lib/mock/f31-build-54009-27934/root/chroot_tmpdir/scmroot/ghc-base-prelude
Cloning into '/var/lib/mock/f31-build-54009-27934/root/chroot_tmpdir/scmroot/ghc-base-prelude'...
$ git reset --hard fb791a5b7660293fa50d703ff7ef46b4a3f3bcaa
HEAD is now at fb791a5 update to 1.3