[Android Apps and Games] observingman:
Well, the first one was from github, the second attempt after uninstalling f-droid was from yout f-droid link. This is the output from the method from normal users at the 1st post:

Welcome to Termux!

Community forum: https://termux.com/community

Gitter chat: https://gitter.im/termux/termux

IRC channel: #termux on libera.chat

Working with packages:

* Search packages: pkg search <query>

* Install a package: pkg install <package>

* Upgrade packages: pkg upgrade

Subscribing to additional repositories:

* Root: pkg install root-repo

* X11: pkg install x11-repo

Report issues at https://termux.com/issues

~ $ pkg update -y && pkg install git -y && git clone https://github.com/decipher3114/Revancify.git && ./Revancify/revancify

Testing the available mirrors:

[*] https://packages-cf.termux.org/apt/termux-main: bad

[*] https://deb.kcubeterm.me/termux-main: bad

[*] https://termux.mentality.rip/termux-main: bad

[*] https://grimler.se/termux-packages-24: bad

[*] https://termux.librehat.com/apt/termux-main: bad

Using fallback mirror: https://packages-cf.termux.org/apt/termux-main

Ign:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Ign:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Ign:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Err:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Something wicked happened resolving 'packages-cf.termux.org:https' (7 - No address associated with hostname)

Reading package lists... Done

Building dependency tree... Done

All packages are up to date.

W: Failed to fetch https://packages-cf.termux.org/apt/termux-main/dists/stable/InRelease Something wicked happened resolving 'packages-cf.termux.org:https' (7 - No address associated with hostname)

W: Some index files failed to download. They have been ignored, or old ones used instead.

Reading package lists... Done

Building dependency tree... Done

Calculating upgrade... Done

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Checking availability of current mirror: bad

Testing the available mirrors:

[*] https://packages-cf.termux.org/apt/termux-main: bad

[*] https://deb.kcubeterm.me/termux-main: bad

[*] https://termux.mentality.rip/termux-main: bad

[*] https://grimler.se/termux-packages-24: bad

[*] https://termux.librehat.com/apt/termux-main: bad

Using fallback mirror: https://packages-cf.termux.org/apt/termux-main

Ign:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Ign:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Ign:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Err:1 https://packages-cf.termux.org/apt/termux-main stable InRelease

Something wicked happened resolving 'packages-cf.termux.org:https' (7 - No address associated with hostname)

Reading package lists... Done

Building dependency tree... Done

All packages are up to date.

W: Failed to fetch https://packages-cf.termux.org/apt/termux-main/dists/stable/InRelease Something wicked happened resolving 'packages-cf.termux.org:https' (7 - No address associated with hostname)

W: Some index files failed to download. They have been ignored, or old ones used instead.

Reading package lists... Done

Building dependency tree... Done

E: Unable to locate package git

~ $ revancify

revancify: command not found

~ $