Git 2.48 Release: With features and bug fixes from over 93 contributors (35 new), including various improvements.

• Faster SHA-1s: Can use a faster, non-collision-detecting SHA-1 for trailing checksums without compromising security, resulting in a 10-13% performance improvement in serving fetches/clones. Built with make OPENSSL_SHA1_UNSAFE=1 or other _UNSAFE variants.
• Bringing --remerge-diff to range-diff: range-diff now accepts --remerge-diff, allowing review of changes in merge commits when rebasing. Also fixes a longstanding bug with --remerge-diff for use with options changing commit traversal.
• Memory leak-free tests: Git can now run its test suite successfully with leak checking enabled, representing significant progress toward converting internals into a callable library.
• Introducing Meson: Git now has support for Meson as an alternative build system, offering advantages like easier use and extensive IDE support. Can run meson setup build && ninja -C build on a fresh copy of Git 2.48 or newer.

Performance Improvements:

• for-each-ref: Can take advantage of optimizations when outputting references in sorted order, running significantly faster.
• Reftable subsystem: Updated to avoid explicit dependencies, handle memory allocation failures gracefully, and reuse reference iterators for faster reference creation and lower memory usage.