$ git clone -n https://src.fedoraproject.org/rpms/llvm15.git /var/lib/mock/f45-build-17457-499/root/chroot_tmpdir/scmroot/llvm15
Cloning into '/var/lib/mock/f45-build-17457-499/root/chroot_tmpdir/scmroot/llvm15'...
$ git fetch origin 49eff99111208d667c8729107519cd6e24dcb0da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm15
 * [new ref]         49eff99111208d667c8729107519cd6e24dcb0da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49eff99 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild