$ git clone -n https://src.fedoraproject.org/rpms/llvm14.git /var/lib/mock/f42-build-3494580-45873/root/chroot_tmpdir/scmroot/llvm14
Cloning into '/var/lib/mock/f42-build-3494580-45873/root/chroot_tmpdir/scmroot/llvm14'...
$ git fetch origin 5447a50b54fd9026d40dd6449129e821e888cb64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm14
 * [new ref]         5447a50b54fd9026d40dd6449129e821e888cb64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5447a50 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild