$ git clone -n https://src.fedoraproject.org/rpms/llvm14.git /var/lib/mock/f38-build-722713-98881/root/chroot_tmpdir/scmroot/llvm14
Cloning into '/var/lib/mock/f38-build-722713-98881/root/chroot_tmpdir/scmroot/llvm14'...
$ git fetch origin 187e326ffe3546ffa7b7fbf4ee7f665a87694c80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm14
 * [new ref]         187e326ffe3546ffa7b7fbf4ee7f665a87694c80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 187e326 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild