$ git clone -n https://src.fedoraproject.org/rpms/llvm13.git /var/lib/mock/f39-build-1963078-43274/root/chroot_tmpdir/scmroot/llvm13
Cloning into '/var/lib/mock/f39-build-1963078-43274/root/chroot_tmpdir/scmroot/llvm13'...
$ git fetch origin dd062067b45d305d6541633747979340149e64eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm13
 * [new ref]         dd062067b45d305d6541633747979340149e64eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd06206 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild