$ git clone -n https://src.fedoraproject.org/rpms/rust-clang-sys.git /var/lib/mock/f40-build-2053963-49096/root/chroot_tmpdir/scmroot/rust-clang-sys
Cloning into '/var/lib/mock/f40-build-2053963-49096/root/chroot_tmpdir/scmroot/rust-clang-sys'...
$ git fetch origin 2a43a5e2803c87911f4a447ad8e552a7fed00c43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clang-sys
 * [new ref]         2a43a5e2803c87911f4a447ad8e552a7fed00c43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a43a5e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild