After deactivating the conda environment, I get a different error.  The commands I entered are:

conda deactivate
make configure
./configure --prefix=/usr
make V=1 all doc

This ends with the following error.
/usr/bin/perl ./build-docdep.perl >doc.dep
/Applications/Xcode.app/Contents/Developer/usr/bin/make -C ../  GIT-VERSION-FILE
make[2]: `GIT-VERSION-FILE' is up to date.
fatal: not a git repository (or any of the parent directories): .git
/Applications/Xcode.app/Contents/Developer/usr/bin/make -C ../  GIT-VERSION-FILE
make[2]: `GIT-VERSION-FILE' is up to date.
    * new asciidoc flags
asciidoc  -f asciidoc.conf -amanmanual='Git Manual' -amansource='Git 2.43.0' -arevdate='' -b xhtml11 -d manpage -o git-add.html git-add.txt
make[1]: asciidoc: No such file or directory
make[1]: *** [git-add.html] Error 1
make: *** [doc] Error 2

Your suggestion to run the following commands results in a different error.  The suggested commands were:
cd git-2.43.0
conda deactivate
make distclean
make all

This ends with the following error.
GIT_VERSION = 2.43.0
    * new build flags
    CC oss-fuzz/fuzz-commit-graph.o
    CC oss-fuzz/fuzz-pack-headers.o
    CC oss-fuzz/fuzz-pack-idx.o
    CC daemon.o
    * new link flags
    CC common-main.o
In file included from common-main.c:3:
./gettext.h:17:11: fatal error: 'libintl.h' file not found
#       include <libintl.h>
                ^~~~~~~~~~~
1 error generated.
make: *** [common-main.o] Error 1

Looking around line 17 in ./gettext.h, I see this.
#ifndef NO_GETTEXT
#	include <libintl.h>

Executing gettext --version returned nothing.  I then downloaded gettext and installed it using the following commands.
./configure
make
make check
sudo make install

I then executed your suggested commands again.
conda deactivate
make distclean
make all
sudo make install

This installed GIT.  Thank you for your guidance!

Jonathan S. Abrams