$ git clone -n https://src.fedoraproject.org/rpms/llvm13.git /var/lib/mock/f41-build-1312420-23509/root/chroot_tmpdir/scmroot/llvm13
Cloning into '/var/lib/mock/f41-build-1312420-23509/root/chroot_tmpdir/scmroot/llvm13'...
$ git fetch origin 0ecfe080121eea60e3f5cc2f5051c4b1e848daa7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm13
 * [new ref]         0ecfe080121eea60e3f5cc2f5051c4b1e848daa7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ecfe08 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild