$ git clone -n https://src.fedoraproject.org/rpms/llvm11.git /var/lib/mock/f40-build-800286-142892/root/chroot_tmpdir/scmroot/llvm11
Cloning into '/var/lib/mock/f40-build-800286-142892/root/chroot_tmpdir/scmroot/llvm11'...
$ git fetch origin c180a94157764e58f1920ef8535b294c2978e9e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm11
 * [new ref]         c180a94157764e58f1920ef8535b294c2978e9e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c180a94 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild