$ git clone -n https://src.fedoraproject.org/rpms/clang18.git /var/lib/mock/f42-bootstrap-3462106-45558/root/chroot_tmpdir/scmroot/clang18
Cloning into '/var/lib/mock/f42-bootstrap-3462106-45558/root/chroot_tmpdir/scmroot/clang18'...
$ git fetch origin da5296bf16529f8f6f3618512a34b5ffcff62c99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clang18
 * [new ref]         da5296bf16529f8f6f3618512a34b5ffcff62c99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da5296b Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild