$ git clone -n https://src.fedoraproject.org/rpms/ktimer.git /var/lib/mock/f39-build-1597693-38459/root/chroot_tmpdir/scmroot/ktimer
Cloning into '/var/lib/mock/f39-build-1597693-38459/root/chroot_tmpdir/scmroot/ktimer'...
$ git fetch origin 2ffd7cc8e1cd07df0f1430c50b1e258eac4eb4f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ktimer
 * [new ref]         2ffd7cc8e1cd07df0f1430c50b1e258eac4eb4f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ffd7cc 23.08.2