$ git clone -n https://src.fedoraproject.org/rpms/rakudo-MIME-Base64.git /var/lib/mock/f31-build-107788-33727/root/chroot_tmpdir/scmroot/rakudo-MIME-Base64
Cloning into '/var/lib/mock/f31-build-107788-33727/root/chroot_tmpdir/scmroot/rakudo-MIME-Base64'...
$ git reset --hard a2f4b200d0ad7db7e182d0e879061a0fdff5f1bb
HEAD is now at a2f4b20 fix build problem