$ git clone -n https://src.fedoraproject.org/rpms/libunwind.git /var/lib/mock/f39-build-1963061-43274/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/f39-build-1963061-43274/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin e3a1a67039f43f9c077945dc99f6a741b6fb83b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libunwind
 * [new ref]         e3a1a67039f43f9c077945dc99f6a741b6fb83b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3a1a67 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild