$ git clone -n https://src.fedoraproject.org/rpms/kmouth.git /var/lib/mock/f39-build-1856601-42426/root/chroot_tmpdir/scmroot/kmouth
Cloning into '/var/lib/mock/f39-build-1856601-42426/root/chroot_tmpdir/scmroot/kmouth'...
$ git fetch origin 576ba86412d043e04bc1e376ba4801b70e14075e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmouth
 * [new ref]         576ba86412d043e04bc1e376ba4801b70e14075e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 576ba86 23.08.3