2WheelDev [1] filed an orphan request for sdrpp-git [2]:

The package has bad versioning issue, the maintainer is aware of the
issue, but correspondence with the maintainer in October 2022 found he
doesn't have the resources to work on the package.

His reply was as follows:

    I know about it. As I've mentioned on the github, the PC that I
use for the AUR is currently out of service.

    It will be edited when I get the time to fix it.

    It's never been an issue since the master branch sees one or more
commits a day most of the time anyway.

In my emails to the maintainer, I mentioned that I would be happy to
co-maintain the package but this proved unsuccessful too

[1] https://aur.archlinux.org/account/2WheelDev/
[2] https://aur.archlinux.org/pkgbase/sdrpp-git/