git: update to v2.46.0

git: update to v2.46.0

Update to git version v2.46.0, this requires changes for these
upstream commits:

* e7da9385708accf518a80a1e17969020fb361048
  global: introduce `USE_THE_REPOSITORY_VARIABLE` macro

* 9da95bda74cf10e1475384a71fd20914c3b99784
  hash: require hash algorithm in `oidread()` and `oidclr()`

* 30aaff437fddd889ba429b50b96ea4c151c502c5
  refs: pass repo when peeling objects

* c8f815c2083c4b340d4148a15d45c55f2fcc7d3f
  refs: remove functions without ref store

Signed-off-by: Christian Hesse <mail@eworm.de>