$ git clone -n https://src.fedoraproject.org/rpms/libkrunfw.git /var/lib/mock/f38-build-718565-96741/root/chroot_tmpdir/scmroot/libkrunfw
Cloning into '/var/lib/mock/f38-build-718565-96741/root/chroot_tmpdir/scmroot/libkrunfw'...
$ git fetch origin b557694c405380f82cc24b1f5dee9d0ee289f058:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkrunfw
 * [new ref]         b557694c405380f82cc24b1f5dee9d0ee289f058 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b557694 Update to 3.11.0 which bundles a 6.2.9 kernel