$ git clone -n https://src.fedoraproject.org/rpms/libkrunfw.git /var/lib/mock/f38-build-side-42-init-devel-1280650-30668/root/chroot_tmpdir/scmroot/libkrunfw
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1280650-30668/root/chroot_tmpdir/scmroot/libkrunfw'...
$ git fetch origin b9e73403996b02211168d5f911982d9f8fc44543:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkrunfw
 * [new ref]         b9e73403996b02211168d5f911982d9f8fc44543 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9e7340 Update to 3.12.0 which bundles a 6.2.14 kernel