The logo at the top of each page is sill the heat, which is specific to the Lepagito theme. Your blog should have its own logo, since the Lepagito logo is copyrighted (see License). To do that, copy first logos from Lepagito to your environment, exactly as:

mkdir content/theme
cp -a ~/pelican-themes/lepagito/static/img theme

In the content/theme/img directory, the files are:

logo.png
favicon-16x16.png
favicon-32x32.png
favicon.ico
apple-touch-icon.png
mstile-150x150.png
site.webmanifest

entry_foooter.png
browserconfig.xml

The first six files are different implementations of the same logo and should be modified. The seventh file should also be modified. The eigth file is the blue pencil article footer: it could be changed or left as is, as you prefer. The last file could be left as is.

Finally, edit again your pelicanconf.py file as:

STATIC_PATHS = ['images', 'theme']

and run again pelican: your logo has been changed.