TL; DR：检查是否可以读写/dev/tty。如果否，并且您曾经su打开过外壳，请检查是否正确使用了它。
我遇到了同样的问题，但是在Linux上，我已经找到了问题。我没有存储我的凭据，所以我总是在提示时输入它们：
Username for 'https://github.com': foo
Password for 'https://foo@github.com':
git处理http（s）连接的方式正在使用中，/usr/lib/git-core/git-remote-https
您可以在此处查看strace：
stat("/usr/lib/git-core/git-remote-https", {st_mode=S_IFREG|0755, st_size=1366784, ...}) = 0
pipe([9, 10]) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f65398bb350) = 18177
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(10) = 0
read(9, "", 8) = 0
close(9) = 0
close(5) = 0
close(8) = 0
dup(7) = 5
fcntl(5, F_GETFL) = 0 (flags O_RDONLY)
write(6, "capabilities\n", 13) = 13
fstat(5, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
read(5, "fetch\noption\npush\ncheck-connecti"..., 4096) = 38
write(6, "option progress true\n", 21) = 21
read(5, "ok\n", 4096) = 3
write(6, "option verbosity 1\n", 19) = 19
read(5, "ok\n", 4096) = 3
stat(".git/packed-refs", {st_mode=S_IFREG|0664, st_size=675, ...}) = 0
lstat(".git/objects/10/52401742a2e9a3e8bf068b115c3818180bf19e", {st_mode=S_IFREG|0444, st_size=179, ...}) = 0
lstat(".git/objects/4e/35fa16cf8f2676600f56e9ba78cf730adc706e", {st_mode=S_IFREG|0444, st_size=178, ...}) = 0
dup(7) = 8
fcntl(8, F_GETFL) = 0 (flags O_RDONLY)
close(8) = 0
write(6, "list for-push\n", 14) = 14
read(5, fatal: could not read Username for 'https://github.com': No such device or address
"", 4096) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18177, si_uid=1000, si_status=128, si_utime=6, si_stime=2} ---
exit_group(128) = ?
+++ exited with 128 +++
所以我尝试直接调用它：
echo "list for-push" | strace /usr/lib/git-core/git-remote-https my
结果：
poll([{fd=3, events=POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND}], 1, 0) = 1 ([{fd=3, revents=POLLIN|POLLRDNORM}])
recvfrom(3, "\27\3\3\1\32", 5, 0, NULL, NULL) = 5
recvfrom(3, "\307|4Q\21\306\334\244o\237-\230\255\336\25\215D\257\227\274\r\330\314U\5\17\217T\274\262M\223"..., 282, 0, NULL, NULL) = 282
openat(AT_FDCWD, "/dev/tty", O_RDONLY) = -1 ENXIO (No such device or address)
openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=2995, ...}) = 0
read(4, "# Locale name alias data base.\n#"..., 4096) = 2995
read(4, "", 4096) = 0
close(4) = 0
openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, "fatal: could not read Username f"..., 83fatal: could not read Username for 'https://github.com': No such device or address
) = 83
exit_group(128) = ?
+++ exited with 128 +++
在这里来到我这里：
openat(AT_FDCWD, "/dev/tty", O_RDONLY) = -1 ENXIO (No such device or address)
...
write(2, "fatal: could not read Username f"..., 83fatal: could not read Username for 'https://github.com': No such device or address
) = 83
git-remote-https尝试通过读取凭据，/dev/tty所以我测试了它是否有效：
$ echo ahoj > /dev/tty
bash: /dev/tty: No such device or address
但是在另一个终端：
# echo ahoj > /dev/tty
ahoj
我知道我使用切换到了该用户，su所以我退出了外壳以查看操作方法，然后发现我使用了命令，su danman -因此我再次对其进行了测试：
~# su danman -
bash: cannot set terminal process group (-1): Inappropriate ioctl for device
bash: no job control in this shell
/root$ echo ahoj > /dev/tty
bash: /dev/tty: No such device or address
我可能忽略了该消息并继续工作，但这就是原因。当我使用正确的开关时，su - danman一切正常：
~# su - danman
danman@speedy:~$ echo ahoj > /dev/tty
ahoj
之后，git开始正常工作
git config --global user.name "Your Name Here"